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The following weapons appear in the video game Counter-Strike Online:
Like in other Counter-Strike games, players can switch between left-handed and right-handed viewmodels, which are simple mirrors of each other. Third-person models are generally modeled true-to-life, but most of the viewmodels appears to animated in left-handed operation first, which would make operation awkward for many of the weapons in real life.
A 2nd generation Glock 17 (retextured model from Counter-Strike) is named "9x19mm Sidearm" in game, it is the spawn weapon of the terrorist faction. As in Counter-Strike, the weapon is sometimes called the “Glock 18”, however the developer has its full-auto mode replaced with a 3-round burst mode instead, as well as the model always lacks the fire selector (possibly on the other side of the weapon) and is incorrectly fed from a 20-round magazine, making it not a genuine Glock 18, but a modified Glock 17.
The weapon comes with a red edition and a variant called the "Battle Glock 18C" which can be fired in full-auto by right clicking the secondary fire key. Interestingly, the models of these variants are higher quality than the original weapon, and the markings on their slides belong to the Glock 18 instead of the Glock 17.
The actual Glock 18C appears only in game posters and selection icons of the 707th SMB and Gerrand.
Heckler & Koch USP45 Tactical
The Heckler & Koch USP Tactical returns from Counter-Strike and named "KM .45 Tactical Pistol" in game. It is the spawn pistol for the counter-terrorist faction and comes with a detachable silencer. The skin is taken from Condition Zero which has a strange blue finish.
This weapon has two variants, the red edition and the "Battle" edition.
The SIG-Sauer P228 uses the same model from Counter-Strike and is called ".228 Compact" in-game. Once again, it is coded to use .357 SIG rounds, which in reality is actually the case for the P229 variant, but not for the P228 which is only available in 9x19mm.
IMI Desert Eagle Mark XIX
The Desert Eagle is named "Nighthawk .50 C" in game. Appears as the one of the most powerful sidearm in game. Its model is almost identical to Counter-Strike: Source.
The weapon comes with a gold-plated variant, a red edition and an akimbo variant which is only available in Zombie modes.
The FN Five-seveN is named "ES Five-Seven" in game, a weapon exclusive to the counter-terrorists. The model is retextured from Counter-Strike with a darker finish. As in all the previous Counter-Strike games, the skins of the Five-seveN were based on the original model which is no longer produced.
Beretta 92G Elite II
A pair of Beretta 92G Elite II is featured as a weapon and named ".40 Dual Elite" in game, even though the pistols are not chambered in .40 S&W, the .40 caliber variant being the Beretta 96G. Probably a homage to John Woo or Chow Yun Fat. The dual pistols are purchasable by the terrorists, as the equivalent to the CTs' FN Five-seveN. The model is the same as in Condition Zero.
Strayer Voigt Infinity
The Strayer Voigt Infinity comes with some color variants and three akimbo configurations. Appears as one of the most diverse weapon and considered one of the most accurate pistols in game. The akimbo variants have secondary firing modes (firing in gangsta stance) which does high rate of fire as the SMGs, although the pistols are relatively inaccurate when firing in bursts. The models have uncocked hammers, which means they couldn't be fired in real-life as the 1911 type pistols are single-action.
The Luger P08 is named simply "Luger" in game, it also comes with gold and silver finishes as well as two upgrade variants. It is the most powerful 9mm caliber pistol in game, but it has low capacity and is not very accurate. It's one of the WW2 classic weapon in game.
The Silver Luger is only available in Zombie Mode 3 and usable by Blair only. It is effective against zombies due to its high knock-back power and higher capacity (15 rounds).
Another note is that the Luger has the distinction of being the only handgun in the game held with an appropriate grip, rather than the default "Valve character" teacupping grip.
A Flintlock Pistol is featured in game and is called "Divine Lock". With this weapon the player can usually kill an enemy with one shot (except for zombies and monsters), although its projectile velocity is quite slow and the weapon is very inaccurate due to the lack of rifling, as well as it has lower rate of fire than many “normal” sidearms in game (firing a shot then reloaded), making it very inconvenient to use in any game modes.
The gun is modeled after the "KTW Flintlock Pistol (G.Washington)" airsoft spring pistol (note the “ASGK” marking engraved on the gun), while that replica is based on the British made Hawkins 1748 pistol, implying that the pistol was the personal sidearm of the first US president.
AMT Automag V
The AMT Automag V is named "Automag V" in game. It has lower accuracy and rate of fire than the Desert Eagle, but is cheaper.
Comes with an anti-zombie variant called "Balrog-I", which can fire incendiaries via a pump-action mechanism by using the secondary firing function.
Mauser M712 Schnellfeuer
The Mauser M712 Schnellfeuer is named "Mauser C96" in-game. It fires in full auto only, and is fed with a 10 round magazine but is coded to use 9mm rounds, which is incorrect since the latter could only be used on the Mauser C96 "Red 9". This was likely done on purpose so that it can share ammunition with other 9x19mm weapons.
The M1911A1 comes with a 7+1 round magazine.
The Calico M950 is called the “M950” in game, it fires in semi-automatic and is fed with 50 rounds. Come with two upgraded variants.
The Calico M950A is called the “M950 Attack” in game, appears as the "upgraded" variant of the M950. It is attached with a usable scope, fed with 58 rounds and can be fires in full-auto.
The FNP-45 appears in the game.
Duck's Foot Pistol
An 19th century “Duck's Foot” hand-held Volley gun is introduced to the game. Erroneously described as chambers for 12 Gauge buckshots.
The Colt Anaconda is named simply "Anaconda" in game and modified to feed with seven .50 AE rounds. Appears as the first revolver in game.
Colt King Cobra
The Colt King Cobra in game is modified to use 7 rounds of .50 AE cartridges. It is equipped with a scope. Comes with a gold-plated variant.
The Colt Python is available in-game. It is coded to use .357 SIG rounds in-game instead of .357 Magnum.
A custom revolver called "Skull-1" appears to be a modified MP-412 REX. It's a break-frame double-action revolver designed for anti-zombie purposes and available to fire in "sharpshooting mode" or "burst firing mode". The weapon is chambered in .50 Anti-Zombie rounds and has 7 rounds in its cylinder. It features shells auto-ejecting via reloading. There's an akimbo variant called "Skull-2".
Benelli M3 Super 90
The Benelli M3 Super 90 returns from Counter-Strike and is named "Leone 12 Gauge Super" in game. It is the cheapest shotgun in game and suitable for close-quarter battle. As in all of the previous games, it is only available in pump-action.
Benelli M4 Super 90
The Benelli M4 Super 90 (a.k.a XM1014) is named "Leone YG1264 Auto Shotgun" in game, using the Condition Zero model. It does lower damage but has the highest rate of fire than any other shotguns.
Comes with a red edition and a variant called the "Balrog-XI". The Balrog-XI can use Dragon's Breath rounds after the user firing a several rounds.
The Daewoo USAS-12 is a fully automatic shotgun with a 20-round drum magazine, available for the terrorists only. Although it is considered powerful at close range, it is unstable to use.
Comes with a variant called the "USAS12 Camo". This variant does higher damage, higher rate of fire and has lighter weight, suitable to use in Zombie modes. The shotgun also has an anti-zombie variant called the "Skull-11". It comes with a 28 round drum mag, a pair of tactical lights and an unusable Aimpoint Comp red rot sight. The Skull-11 have two functions, "Buckshot mode" and "Slug mode". When using "Slug mode", the user can hit targets at longer distances, but the rate of fire will be greatly reduced, turning it to a semi-automatic weapon.
Winchester Model 1887
The Winchester Model 1887 is named "M1887" in game, possibly modeled after a Norinco copy. It is quite useful for hunting zombies thanks to its high knock-back effect. Most variants of M1887 in the game feature Terminator 2 style flip-cocking animations after firing a shot. Although most of them (except the "Maverick" variant) didn't have their cocking levers enlarged, which would possibly break the users' fingers when they try to flip-cock them in real-life. And due to the weapons weren't sawn-off yet, the user would be very awkward to do so.
The M1887 also comes with two gold-plated variants (Gold Edition and CSOGS Edition), Elegant, Christmas and Maverick. The "M1887 Maverick" is unique as it is the only shotgun that is listed in the handgun class. The Maverick version is also a sawn-off variant and its capacity is reduced to 6 rounds as a result.
Sawed-off Double Barreled Shotgun
A sawed-off side by side 12 Gauge Double Barreled Shotgun is called “Double-Barrel” (also known as the “DBarrel”) in game. It is powerful, but has the lowest capacity out of all shotguns. It's also the weapon which has the highest knock-back effect in the game.
There's a variant called the "Quad Barrel". The "Quad Barrel" is a shotgun with four barrels, it's only available in Zombie mode 3 and usable by the heroine only. The Quad Barrel could fire 4 shells each time when the user hold on the secondary fire key. Another variant is called the "Triple Barrel", it shares most performances as the "Quad Barrel" except of the lack of a fourth barrel. The Triple Barrel is only obtainable via upgrade events.
The Kel-Tec KSG 12 gauge is fed with 15 rounds in game. It is incorrectly reloaded by placing all the 15 shells in a single tube instead of both tubes.
This shotgun comes with two upgrade variants, a gold-plated variant and a heavily modified version known as the "Thanatos 11".
The Franchi SPAS-12 has a several configurations in game. The original model is described as the civilian version. It lacks a buttstock and fires in pump-action only.
The "SPAS-12 Deluxe" variant attaches a metallic folding stock, and can be fired in either pump-action or semi-automatic. Another variant, the "SPAS-12 Cobra", is fitted with a fixed stock and a laser designator mounted on the weapon's upper receiver. It can be fired in pump-action or semi-automatic. The "SPAS-12 Maverick" is another variant which fed from a 20-round detachable box magazine and available in semi-automatic only, it features a metallic stock which is permanently trussed up with a rope.
The UTAS UTS-15, a Turkish bullpup pump-action shotgun is available in game as the "UTS-15"; it has the highest rate of fire of all pump-action shotguns in-game. It is incorrectly reloaded by placing all the 15 shells in a single tube instead of both tubes.
Comes with a few variations and a heavily modified version called the "Janus 11".
Pancor Jackhammer Mk3A1
The Pancor Jackhammer Mk3A1 appears as the "PJ MK3A1", using a 10 round mag.
The QBS-09 is fed with 5 rounds.
The Steyr TMP is named "Schmidt Machine Pistol" in game. It is a low cost sub-machine gun with an integrated suppressor for the Counter-Terrorists. Model is from Condition Zero.
The gun also comes with a variant called the "TMP Dragon" which is only obtainable in the Year of Dragon.
Unlike most of other guns, the MAC-10 retains its name because the company holding the rights to the name went bankrupt. It's an equivalent to the TMP, as the low cost sub-machine gun for the Terrorist faction. The weapon model is from Counter-Strike, which erroneously shows the gun as a closed-bolt weapon.
Heckler & Koch MP5A5
The Heckler & Koch MP5A5 returns from Counter-Strike (with different front sight) and named "KM Submachine Gun" in game. It is the SMG with the most balanced performances in game and is the symbol weapon of many special operations forces. As in Counter-Strike and Condition Zero, the first person model shows that the weapon's extractor is at the wrong side, it shouldn't be on the same side which the charging handle is located.
It comes with a "Chinese Year Edition", a gold-plated variant and a "Battle" variant. All of these variants have higher knock-power than the original weapon.
Heckler & Koch UMP45
The Heckler & Koch UMP45 is named "KM UMP45" in game. Appearing to filled the lack of firepower of the MP5. It's a weapon from Counter-Strike. Just like the MP5, the extractor is at the wrong side, it shouldn’t be on the same side which the charging handle is located. And the bolt will magically locks back during reloads.
The weapon also comes with an Anti-zombie variant which called the "Skull-3". It is chambered in .45 Anti-Zombie rounds and featured with a 35 round mag, Aimpoint Comp Scope, undetachable suppressor and also can be dual-wielded. Another variant is called the "UMP45 Snake" which can be obtained via special events only.
The P90 returns from Counter-Strike named "ES C90" in game. It has high penetration power, high rate of fire and also high capacity but it does low damage and is expensive. It also comes with a "Chinese Year Edition". The model is the original Counter-Strike P90 with front ripped from Counter-Strike: Source model.
Heckler & Koch MP7A1
The Heckler & Koch MP7A1 appears as the most compact SMG in game, but is only fed with a 20-round magazine. It can be switched between "A mode" (which changes the firing stance to teacupping, an extremely dangerous way to fire the weapon) and "B mode" (the user will disables the iron sights to installs the Zeiss sight and uses the buttstock and the foregrip to better controls the weapon). In A mode, the rate of fire is extremely high, while in B mode, the rate of fire will be greatly reduced, turning it to a semi-automatic carbine. But at the same time, the accuracy is increased and the scope is usable.
The weapon comes with a high-capacity variant called the "MP7A1 60R" which fed with a 40-round magazine (60 rounds in game) and an akimbo variant which only available in Zombie modes.
The M1921 Thompson is named "Thompson Chicago" in game. Also comes with a gold plated variant. It's powerful and has high capacity, also has lower price than many SMGs. It's also one of the WW2 classic weapon in game but has erroneously shown as a closed-bolt weapon.
The gun is also comes with two upgrade variants. The Janus-3 is a heavily-modified variant of the Thompson, it comes with a fake holographic sight, and a M1A1-like charging handle. Interestingly, "Public Enemies" inscriptions can be seen on these weapons' receivers.
KRISS Vector SMG
The KRISS Vector is named "Kriss Super V" in game, comes with an unusable holographic sight, a detachable suppressor and an akimbo configuration. Its firepower is equal to the UMP45 and the Thompson. Although it's cheaper, low recoil, accurate and has very high rate of fire.
The “Dual Kriss Custom” is the modified version of the dual wielding variant, the weapons were fitted with extended barrels with barrel shrouds and only used by the heroine in Zombie Mode 3.
Heckler & Koch MP5K PDW
The Balrog III is based on the Heckler & Koch MP5K PDW. The model comes with an EO-Tech holographic sight.
The MP40 appears in the game. It has an incredibly higher rate of fire than the real one and is erroneously shown as a closed-bolt weapon.
Sten Mk II
The Sten Mk II retains its name in game. The model has erroneously shown it as a closed-bolt weapon.
IMI Mini Uzi
The IMI Mini Uzi appears as the “Uzi”, also comes with a dual wielded variant.
The PP-2000 appears, using a 44-round mag.
Izhmash PP-19 Bizon-2
The PP-19 Bizon-2 appearing in the game is a 9mm Para variant, fed with 64 rounds. The safety is modeled on the safe position.
The Sterling SMG appears in the game and is fitted with a bayonet.
Assault & Battle Rifles
The AK-47 returns from Counter-Strike and named "CV-47" in game. As the most favorable rifle for the terrorist faction. Just like its real-life counterpart, It's powerful and cheap, but inaccurate when fired fully-automatic.
It comes with a gold-plated variant and a "special dragon edition" which can perform tactical reloads. In Zombie Modes, a high-capacity variant of the AK is also available. It is fed with a 60 round magazine (a U-shaped magazine that never being standard issued in the Soviet/Russian Armed Forces, but in reality, it can hold 100 rounds), fitted with black furniture and with Aimpoint Comp scope attached on the rifle's upper handguard, it also does very high damage against zombies and has higher rate of fire than the original AK.
The "AKM" (possibly manufactured by some Ex-eastern bloc states) also appears in game and exclusive to the terrorist faction as the equivalent to the HK416. It is not modeled after an actual AKM, but after an AK-47 fitted with synthetic furniture, as well as an AK-74M/AK-103 style handguard. The weapon seems to have better performances than its elder brother.
IMI Galil ARM
The Galil ARM returns from Counter-Strike and is named "IDF Defender" in game. It has the stats of the 5.56x45mm variant. This weapon is available for the terrorist faction only and is one of the cheapest rifle in game, performances are fair. The weapon has a Condition Zero model on original Counter-Strike animations. The 5.56x45mm NATO version of the Galil ARM is seen in the purchase icon, and is also the gun the "Battle Galil" and the "Galil Maverick" are based on.
Comes with a variant called the "Battle Galil" which has a correct arc magazine. The “Galil Maverick” is a variant which uses “jungle-style” magazines, it has faster reload speed than any other variants.
GIAT FAMAS F1
The FAMAS F1 is renamed as "Clarion 5.56" in game, it is one of the cheapest rifle for the counter-terrorist faction and the equivalent to the Galil. It's able to fire in 3 round burst, has low recoil and high rate of fire but also low capacity. Retextured model from Counter-Strike.
Comes with a variant called the "Battle FAMAS".
SIG SG552 Commando
The SIG SG 552 Commando is named "Krieg 552" in game and is only available for the terrorist faction. Appears as one of the assault rifles with the highest rate of fire. Effective in close to middle ranges but has low accuracy due to its unmanageable recoil. It has an original Counter-Strike model with Condition Zero scope.
Steyr AUG A1
The Steyr AUG A1 is named "Bullpup" in game. Available for the Counter-Terrorists faction as an equivalent to the SG552. It has high rate of fire and good accuracy, effective in medium to long range. It's a weapon from Counter-Strike.
Colt M4A1 Carbine
The M4A1 returns from Counter-Strike, and the counterpart to the Terrorists' AK-47. Model is ripped from Counter-Strike: Source. As in Counter-Strike and Counter-Strike: Source, the user will incorrectly chambers the weapon by pulling the forward assist instead of the charging handle, and the dust cover will close automatically after firing a shot, these errors had also occurred in most of the AR-15 based weapons in game.
The M4A1 has 6 variants, most of them has attachable suppressors with the exception of M4A1 Scope and M4A1 Dark Knight, which zooms in instead. The gold-plated variants (Gold Edition and CSOGS Edition) has a foregrip and tactical light attached to its RIS handguard while the M4A1 Dragon has "speed reloading" feature if it is paired with the Dragon Knife.
The Daewoo K1A, a Korean Carbine classified as SMG in game is available for the Counter-Terrorist faction only. It has similar firepower and high rate of fire which equal the assault rifles. It can also effective at long range.
It has a Dragon painted variant called the "K1ASE" which does higher damage and has better accuracy plus rate of fire. Another variant is called the “K1A Maverick”, it features a foregrip and uses jungle-style magazines.
Heckler & Koch XM8
The XM8 in game can be convert freely between the carbine variant and the sharpshooter variant, as the free-edition rifle for the terrorist faction. It has high rate of fire and light weight, but is slightly inaccurate when firing in bursts. Comes with a usable scope.
The FN SCAR in game can be convert freely between the SCAR-L and the SCAR-H. It's available for the Counter-Terrorists as a free-edition rifle and is the equivalent to the Terrorists' XM8. The SCAR-L has a higher rate of fire and accuracy, making it effective in medium range. The SCAR-H is powerful but has a low capacity and heavy weight, making it mostly effective at close range.
The QBZ-95 is fed with a 75 round drum magazine, appears as the "QBB95" and belongs to the MG class in game. This "MG" has similar features as the assault rifles (although the QBZ-95 itself is already an assault rifle) and also has cheap price.
It comes with a high-capacity variant called the "QBB95EX". This variant is fed with 80 rounds and with 400 rounds spare ammo, suitable to use in zombie modes. Another variant is called the "Battle QBB95". It increases the magazine capacity to 100 rounds and has higher rate of fire.
Sage Mk 14 Mod 0 EBR
The Mk 14 Mod 0 Enhanced Battle Rifle is named "M14 EBR" in game. Appear as the most powerful "assault rifle" in game. The rifle is accurate when firing in single, but is bulky, has a low rate of fire, and low capacity.
It also comes with an Anti-Zombie sniper rifle variation which called "Skull 5", the rifle fires 5.56 Anti-Zombie round and fed with 24 rounds in “jungle-style” magazines. Another variant which called the "Skull-4" is also based on the EBR. The Skull-4 is a dual-wielded weapon which chambered in 5.56 Anti-Zombie round, with EO-Tech holographic sights installed and fires in semi-automatic only, these rifles were totally fed with 48 rounds. Those anti-zombie variations are possibly modified Ruger Mini-14s with EBR receivers and parts.
The FN F2000 is named simply as "F2000" in game. Recoil is low, comes with a zoomable scope.
IMI Tavor TAR-21
The IMI Tavor TAR-21 is named simply as "TAR-21" in game. Comes with an EO-Tech holographic sight. This rifle has high rate of fire but low recoil, and even has high knock-back power against zombies. The weapon has a very similar reloading animation wth the TAR21 in Call of Duty: Modern Warfare 2.
The M16A4 retains its name in game. Painted with desert camo and with foregrip installed. It is only available for the counter-terrorist faction. The weapon is only be able to fire in 3 round burst. Recommended for use in middle range engagements.
The AN-94 retains its name in game and is only available for the Terrorist faction, as the equivalent of the M16A4. The weapon's only be able to fire in a fast 2 round burst. It's very accurate and has a better performance than its counterpart, effect in middle ranges. The in-game weapon is poorly modeled as the modeler didn't has its magazine slanted to the right. The weapon has a similar tactical reloading animation as the AN-94 appearing in Battlefield 3 and Battlefield 4.
Haenel Sturmgewehr 44
The Sturmgewehr 44 is available in game with two upgraded variants and a gold-plated variant. The overall performences are similar to the "CV-47", as it's very inaccurate when firing in bursts and has lower rate of fire than many modern assault rifles.
The QBZ-95B is a shortened carbine variant of the PLA standard issue rifle, the QBZ-95. Because the weapon stat files are derived from the Galil, it has a 35 round magazine and is coded to use 5.56mm NATO rounds instead of 5.8mm. The weapon a has high rate of fire but also high recoil, suitable to use in close-quarter battles. It is also the one of the cheapest rifles in game after Galil, which costs about $2,100.
Heckler & Koch HK416
The HK416 retains its name in game and exclusive to the counter-terrorist faction. It comes with a usable suppressor and shares similar performances as the M4A1.
Comes with a variant called “Janus-5” which features a foregrip and use Magpul P-MAGs.
The L85A2 is exclusive to the Counter-Terrorist faction. Erroneously comes with 3-round burst function.
The FN FNC belongs to the terrorist faction as their equivalent of the L85A2. This rifle has moderate accuracy and a controllable rate of fire.
The M16A1 is an exclusive weapon for the counter-terrorist faction. Comes with a 30 plus 1 round magazine and has selective fire function. The weapon is accurate but is hard to control when firing in bursts, effective in middle ranges. The rifle has a "Expert" variant, which can perform buttstrokes in close-quarter combat. The first person model of the M16A1 (except its variant) has the same animations as the M4A1, implying that it has reused the incorrect drawing and reloading animations as the previous weapon.
Heckler & Koch G36C
The Balrog V is based on the Heckler & Koch G36C, it is fitted with a foregrip, a holographic sight and a tactical light.
Heckler & Koch G11
The Heckler & Koch G11 is named "HK G11" in game and fed with 50 rounds, comes with a fast 3-round burst function.
The AKS-74U is named "AK-74U" in game and is exclusive to the terrorist faction, equivalent to the M16A1. The rifle is powerful in close range, but is not effective in longer ranges due to its unmanageable recoil and extremely poor accuracy, recommended for use in CQB only. The model incorrectly shows the weapon's selector is set to safe.
The Beretta ARX-160 is named "ARX-160" in game, fitted with a Leupold Mark 4 CQ/T optical sight and a foregrip.
Springfield M1 Garand
The M1 Garand appears and is incorrectly coded to use 7.62 NATO rounds.
TsKIB SOO OTs-14 "Groza"
The OTs-14 Groza is named "Groza" in game. The model incorrectly shows that the weapon has ejection ports on both sides (which will makes the weapon extremely dangerous to fire in real-life), and the bolt will automatically locks back after the user removes the magazine, it will only back in position after the new magazine is inserted, thus no manual cocking animations are shown.
Silver Shadow Gilboa Shorty
The Gilboa Shorty appears as the “Gilboa Carbine” in-game.
Silver Shadow Gilboa Snake
The Gilboa Snake appears as the “Gilboa Viper”, the upgraded variant of the Gilboa Carbine in-game. Fitted with a pair of laser designators and a red dot sight.
Norinco Type 86S
The Norinco Type 86S appears and holds 30 rounds even though it is modeled with 20-round magazines. It fires in full-auto.
DIO KH2002 Sama
The “Burning Bullpup” is a Thales F90 fitted with ACOG scope and FN GL1 grenade launcher.
FN M249-E2 SAW
The M249-E2 SAW returns from Counter-Strike and is named simply "M249" in game. It's suitable used for covering teammates in the front line.
It comes with an Anti-Zombie variant called the "Skull-7". The Skull-7 is chambered with 120 rounds of 5.56 Anti-Zombie cartridge and equipped with a zoomable M145 machine gun optic. It has its front ripped from CSS model and positioned too high. The weapon also has five more variants: the red edition, camouflaged edition, the "Expert" variant which can perform buttstrokes in close-quarter combat. As well as the "Skull-8", it has a usable axe-type bayonet and fed with 120 rounds of 5.56 Anti-Zombie cartridge. The “Skull-6” is another variant which equipped with an optic.
The MG3 retains its name in game. It is fed from a 200-round ammunition box and is very effective in zombie modes due to its high rate of fire can suppresses a small group of zombies. The user uses the bipod as a foregrip to better control the weapon when firing it.
It has gold-plated, Christmas special edition, and upgraded variants. The “Janus-7” is another heavily modified variant.
GE M134 Minigun
The Handheld GE M134 Minigun is named simply as "M134" in game. Comes with 200 round belt. It has the highest rate of fire than any other MGs (but still far lower than the real Minigun). The user needs to spend 1.5 seconds to spool up the barrels before firing it. The weapon is also extremely heavy, greatly reducing the user's moving speed when firing it.
It comes with a modified variant (M134 Predator) which could shorten the time of spooling up the barrels. Other variants included the Christmas edition and the “M134 Vulcan”. The latter variant feature eight barrels and quick bursts which only made appearance in Zombie Mode 3 and usable by the hero.
Heckler & Koch HK23E
The Heckler & Koch HK23E is named simply as "HK23" in game, fed from a 100-round ammunition box. It has high flexibility and is suitable for engage the zombie bosses in Zombie Scenario Mode.
It comes with a gold-plated variant and two upgraded variants. Oddly, the model always shows the weapon's selector is set to 3 round bursts, and the extractor is at the wrong side, it shouldn’t be on the same side which the charging handle is located. And the bolt will magically locks back during reloads.
Saco Defense M60E4
The M60E4 retains its name in game. Comes with 100 round ammunition box. It is powerful, highly flexible, surprisingly accurate, but has a low rate of fire. The weapon also comes with gold-plated and “Maverick” variants.
A variant called the Balrog VII is also based on the M60E4, it fires explosive rounds and fed with 120 rounds. The weapon is fitted with a M145 machine gun optic.
Heckler & Koch MG36
The MG36 retain its name in game, appearing as the most flexible machine gun in the game after the "QBB95", with high rate of fire but manageable recoil. Comes with 100 round C-MAG drums and a usable optic.
It has a gold-plated and a Christmas Special variant. The Christmas variant shoots out ice bullets instead of regular bullets, and it is also suppressed.
The PKM is fed with 150 rounds 7.62mm cartridge in an ammo box. It is powerful but inaccurate and has high recoil, could be switched between "automatic mode" and an erroneous "3-round burst mode".
It also comes with gold-plated and upgrade variants.
FN MK 48 Mod 0
The Mk 48 Mod 0 is simply named "MK48" in game. Comes with an EO-Tech Holographic Sight, a foregrip and a 120 round ammo box, both accuracy and rate of fire are low.
It has a variant called the “Thanatos-7” which can shoots a propeller-like blade via secondary firing mode. A fictional weapon called the “VULCANUS-7” is also resembles the Mk 48.
The Daewoo K3 is simply named "K3" in game. Comes with a 150 round ammo box. Appears as a free-edition machine gun for players to use. It is also the spawn weapon in Zombie Scenario maps.
The Browning M2HB appears as "M2" in game as a man-portable weapon. In mode A, the player will fires the gun by carrying it (fires in single only), accuracy is extremely low and recoil is high. While in mode B, the player installs the tripod and uses it as a mounted weapon (fires in automatic), perfect when used in a bunker against zombies.
Unusable M2s are also seen mounted on Humvees in some maps (Reused from Counter-Strike: Condition Zero).
The MG42 comes with a 95 round drum magazine, and is incorrectly coded to fire 7.62 NATO rounds.
The M1918A2 BAR is named “M1918 BAR” in game. It is classified in the rifles category, and is coded to firing 7.62 NATO rounds.
IWI Negev NG-7
Heckler & Koch HK121 I
The Heckler & Koch HK121 I (MG5 A2) comes with an upgraded variant which has a drum-fed under-barrel grenade launcher attached below the handguard.
CIS Ultimax 100 Mk 3
The Ultimax 100 Mark 3 is simply called the "Ultimax 100" in game, fed from a drum magazine.
The "Oz Tin Robot Machine Gun" is a heavily-modified version of the Maxim Gun.
The Steyr Scout is renamed to "Schmidt Scout" in game. As in Counter-Strike, the Scout is accurate, quite and light but is weaker than the "AWP" for balance reasons, requiring the user to hit 2 shots to kill an enemy (except for headshots), making it a professional sniper's choice. However, the weapon is almost useless in Counter-Strike Online when other 7.62mm bolt-action sniper rifles were introduced to the game, as they are all powerful than the Scout. The model is retextured from Counter-Strike model but with a scope from Condition Zero. Comes with a red edition.
Heckler & Koch G3SG/1
The Heckler & Koch G3SG/1 is named "D3/AU-1" in game. Available for the terrorist faction. While it has a model from Counter-Strike, its scope is ripped from Source. As most of the “HK slap” weapons in game, the extractor is at the wrong side, it shouldn't be on the same side which the charging handle is located .
SIG SG 550 SR
The SIG SG 550 SR is named "KRIEG 550 Commando" in game. Available for the counter-terrorist faction, equivalent to the G3SG/1. It has a Counter-Strike model, with Condition Zero scope.
The VSK-94 retain its name in game, comes with an integrated suppressor and exclusive to the counter-terrorist faction. Suitable to use for silent kills or uses as an SMG due to its light weight and full-auto feature. The weapon has the highest rate of fire in the sniper rifle category, but it is extremely inaccurate when firing in bursts due to high recoil and does low damage as other 9mm SMGs (using the same ammo in game). Also, the scope can be zoomed once only. Interestingly, despite that the model showing the VSK-94 has PKN-03M night vision scope attached, it still reuses the original sight reticle from Counter-Strike and the scope does not featuring any night vision functions.
The SVD is named simply "SVD" in game, as the terrorists' equivalent to the VSK-94. The user could usually kills an enemy with a shot, although it is less accurate due to the high recoil. Comes with a variant called "SVDEX" and only available for the hero in Zombie Mode 3. It features a Barrett style muzzle brake, 20 round magazine, a sawn-off M203 and an unusable EOTech Holographic sight. Interestingly, despite that the model showing the Dragunov has PSO-1 scope attached, it still reuses the original sight reticle from Counter-Strike, instead of the “exclusive” sight reticle of the "M400".
Accuracy International Arctic Warfare Magnum
The Accuracy International Arctic Warfare Magnum (a.k.a. the "AWP") returns from Counter-Strike and is named "Magnum Sniper Rifle" in game, with a few variations. Its model is slightly improved from Counter-Strike, and is possibly using the Source scope. As in all of the Counter-Strike games, the AWM is is often incorrectly referred to as the "AWP". The actual Arctic Warfare Police is only chambered for 7.62 NATO instead of .338 Lapua Magnum. Holds 10 rounds in its magazine, though in reality the AWM is only fed from 5-round magazines, the 10-round magazine being on the actual AWP instead.
A variant called the "AWP-Z" is the zombie infected version of the "AWP".
The Sako TRG-42 is named "TRG42" in game, comes with a folding stock and fed with 10 round magazine. It shares most performances as the AWP, but this rifle has different sight reticle.
Comes with a variant called the "TRG42 White Gold".
Heckler & Koch SL8-1
The Heckler & Koch SL8-1 is named simply "SL8" in game. Comes with 20 round mag and 25 round for the gold-plated, shiny gold-plated version and high capacity variant. Even though this is the single stack SL8-1 variant, it erroneously uses the shorter double stack magazines of the European/Canadian variants. The high capacity variant feeds from AR-15 magazines, a possible modification for the SL8-1 done by replacing the magazine well and removing part of the receiver. The rifle is weak, but does high rate of fire and has high accuracy.
Remington M24 Sniper Weapon System
The Remington M24 Sniper Weapon System is called simply "M24" in game and is painted with urban camo. Erroneously comes with a 10-round detachable magazine (it's not an M24A2 as the weapon's magazine is shorter and is flush into the receiver. It is suggested that the weapon is just a custom Remington 700 rifle). The user can usually kill an enemy with one shot in medium ranges.
EDM Arms Windrunner M98
The EDM Arms Windrunner M98, the .338 Lapua version of the EDM Arms Windrunner appears as the "M400" in game, seemingly named after the Cheyenne Tactical M-200 Intervention. The weapon is not a CheyTac M200 Intervention as the model lacks the carrying handle and the handguard. In game, this rifle has a unique exclusive sight reticle.
Also comes in "Splash" variant.
Walther WA 2000
The Walther WA 2000 retains its name as the WA2000 in game and is erroneously feed with 12 rounds.
The rifle also comes with a gold-plated variation which fed with 15 rounds and shiny gold-plated variant to celebrate Counter-Strike Online's 10th anniversary.
The Barrett M95 retains its name in game. One of the sniper with the best DPS against human opponents and bosses in Human Scenario, only hampered by its 5-round magazine and heavy weight.
The weapon also comes with a Christmas special edition variant, as well as the White Tiger as its Transdecent counterpart.
Remington XM2010 Enhanced Sniper Rifle
The Remington XM2010 Enhanced Sniper Rifle is named the "XM2010", appears as the one of the most powerful sniper rifle in game and fed with 5 rounds. It does higher damage than the M24, but has a lower capacity. The rifle also shares the same scope reticle as the M24 and the Parker-Hale.
Accuracy International AS50
The Accuracy International AS50 is an anti-materiel sniper rifle which fires in semi-automatic and fed with 5 round magazine.
Interestingly, the weapon has a very similar reloading animation with the AS50 in Call of Duty: Modern Warfare 3. The weapon also comes with two upgrade variants, a pink gold edition, and a "Bendita" variant, which deals holy afterburn to enemies.
Parker-Hale Model 1200
The Parker-Hale Model 1200, a British-made bolt-action sniper rifle which shares similar performance to the M24, appears as the "M82" in game (although it's not actually a Parker-Hale M82, note the details of the buttstock). It erroneously has a 10 round (or even higher in upgraded variants) detachable box magazine plus its ZF-69 scope can be zoomed once only. Additionally, the rifle shares the same sight reticle as the M24 and the ESR.
Blaser R93 LRS2
The Blaser R93 LRS2 is named simply as "R93" in game. It has lighter weight than the AWP and has higher rate of fire, comes with a 5 round mag.
Accuracy International AW50F
The Accuracy International AW50F is named "AW50" in game. Comes with a 5 round mag.
Heckler & Koch PSG-1 A1
The Heckler & Koch PSG-1 A1 is named "PSG1A1" in game. Comes with a 5 round magazine.
A Hungarian Mosin-Nagant M/52 rifle is named "Mosin-Nagant" in game (distinguishable by the "02" and "B" markings engraved on the buttstock), fed with 5 rounds and uses old scope reticle from Counter-Strike, and the only sniper rifle so far that is reloaded with a bullet at a time. Despite being a scoped, bolt action sniper rifle, it is not available for use in rooms with "AWP Battle" mutation turned on.
PGM Hecate II
The PGM Hecate II is called “Hecate II” in game, also available in Battle variant.
The ZVI Falcon is available in the game, and is incorrectly depicted as single-shot, whereas the real weapon holds two rounds. Also available as the Power Falcon.
M67 Hand Grenade
The M67 Hand Grenade is named "Fragmentation grenade" in game and is only usable in the "Frag War" mode. It also has an incendiary grenade variant which is available for use in the zombie modes.
Model 24 Stielhandgranate
The Model 24 Stielhandgranate is named simply as "M24 Grenade" in game.
M79 Grenade Launcher (Sawn-Off)
The M79 Grenade Launcher is named "M79 Saw-Off" in game. It's frequently used by players in earlier Zombie Scenario games as the weapon could kill at least a dozen of zombies in one shot.
It comes with a gold-plated variant, shiny gold-plated variant and a variant called the "Shooting Star". The “Janus-1” is the heavily-modified version of the M79, it features a fake holographic sight instead of the original rear sight.
Milkor Mark 14
The Milkor Mark 14 appears as the "M32 MGL", also available in "Venom" variant, which replaces HE grenades with poison grenades.
Heckler & Koch XM25 CDTE
A fictional weapon called the “VULCANUS-5” resembles the Heckler & Koch XM25. However, it is an assault rifle which fires smart bullets instead of 25mm grenades, and is fed from a 40-round high capacity box magazine.
M203 Grenade Launcher (Sawn-Off)
The M203 Grenade Launcher appears as a part of the "SVDEX".
Some game posters also show a CT operative of unknown nationality wielding an M4A1 attached with an M203, an Aimpoint Comp sight, and a flashlight.
The FN GL-1 appears as a part of the “Burning AUG”.
Mk 19 Grenade Launcher
The mounted machine gun in Zombie Scenario Mode is seems to be based on the Mk 19 Grenade Launcher.
Bofors M136 AT4
The M136 AT4 is named "AT Lance" in game. Available only in the "Human Scenario" and "Metal Arena" modes. It's usually used by players in Human Scenario Mode to engage enemy helicopters and bosses. Comes with an AT4-CS variant which is available in all game modes. Interestingly, these launchers are reloadable in game.
The RPG-7 comes with 5 spare rockets in game. It appears to be the only existing weapon in CSO featuring usable iron sights.
M67 Recoilless Rifle
A modified version of the M67 recoilless rifle is called the “Bazooka” in game. It appears as the primary weapon for the players in "Bazooka mode". The weapon is fed from a 20 round ammo box for some reason, the scope is usable.
The M14 landmine appears in the zombie union mode.
Appears as the "Claymore Mine MDS". Can be detonated manually or with laser tripwires.