ArmA III is a military-simulation video game developed and published by Bohemia Interactive Studio (BIS) exclusively for the PC. It is the third installment of the ArmA series, officially announced on May 19, 2011, and is built around the new Real Virtuality 4 engine owned by BIS. The playable alpha version of the game was made purchasable on the Steam store and BIS' page on March 5, 2013. The beta was released on June 25, and the full release was on September 13, 2013. New weapons and vehicles are added with each new part of the free-to-download campaign, split up into multiple chapters.
The storyline is set in mid-2030s during an international conflict between NATO and the Iranian Armed Forces in the Aegean Sea. The main protagonist is Captain Scott Miller, a former United Kingdom Special Forces (UKSF) operator who becomes stranded on a 270km² fictional Mediterranean island called "Altis" (Based upon the 475km² Greek island, Lemnos), and must fight his way out by building an effective resistance force in the process and cooperate with the local population.
Traditionally with the ArmA series, the player is able to play with three more characters: Lieutenant Jeff Larkin, a helicopter pilot; Sergeant Rick Hutchinson, a (possibly) tank commander; and Corporal Ben Kerry, a light infantry soldier - all are serving in different units of the United States Army 7th Infantry Division (7th US Army Europe).
The following weapons are featured in ArmA III:
The Walther P99 serves as the standard sidearm of NATO forces. It's in game designation is P07, and it's chambered for 9x21mm, the same as the OPFOR pistol.
The MP-443 Grach appears as the OPFOR pistol under the fictional classification of Rook 40. Like the P99, it is chambered in 9x21mm, and their magazines are interchangable.
The ACP C2 is the sidearm of the GREENFOR forces. It is a 1911 variant, based on a combination of a variety of models, namely the Kimber Custom Covert II, with the Kimber Desert Warrior and the Colt Rail Gun. It is chambered in .45 ACP and has a magazine capacity of nine.
The FN FNP-45 is BLUFOR's "heavy pistol". Heavy pistols are essentially similar to regular pistols in game, except they can mount certain optics on their top rail. It was released as a free update on October 31st. In-game, it is known as the 4-five .45, and is chambered for .45 ACP.
Chiappa Rhino 60DS
The Chiappa Rhino 60DS is OPFOR's "heavy pistol". Heavy pistols are essentially similar to regular pistols in game, except they can mount certain optics on their top rail. It was released as a free update on October 31st. In-game, it is named the Zubr, and is chambered in .45 ACP.
The TDI Vector is the BLUFOR SMG of choice. It is known as the Vermin SBR, and fires the .45 ACP cartridge, with a magazine capacity of 30.
CZ Scorpion Evo 3 A1
The CZ Scorpion Evo 3 A1 is the OPFOR SMG of choice. It's known in game as the Sting 9mm, and uses 9x21mm ammo.
ST Kinetics CPW
The ST Kinetics CPW is the INDFOR SMG of choice. It's know in game as the PDW2000, and uses 9x21mm ammo.
U.S. Army soldiers use a fictional assault rifle (designed by real-life CMMG, Inc.), that has design elements borrowed from the Remington ACR and Robinson Armament XCR. Compact and light machine gun variants are also available. By default, it fires caseless 6.5mm ammunition, although it could possibly fire traditional cased ammunition, due to the presence of an ejection port on the right-hand side of the weapon.
The MX comes in five variants- a standard rifle, a carbine, a grenadier (3GL mounted at its 6 o'clock rail), a squad support weapon, and a Designated Marksman Rifle variant.
DIO KH2002 Sama
Iranian soldiers are seen with a fictional variant of the DIO KH2002 Sama, known in game as the Katiba 6.5mm. It fires caseless 6.5mm rounds. The front sight has been removed and the carrying handle has been lowered and modified with a rail system. Like the other assault rifles, the KH2002 can be customized with various attachments.
FN F2000 Tactical
A fictional variant of the FN F2000 Tactical is used by INDFOR soldiers and appears as the Mk 20. It features the Monolith Arms rail system, and can be customized with a variety of attachments. A grenade launcher is available for the weapon and called the "Mk 20GL". It is based on the FN GL-1.
IMI Tavor TAR-21
The IMI Tavor TAR-21 is used by the NATO faction, specifically the FIA guerrillas. The in game designation for the full length variant is TRG-21, while its carbine version is known as TRG-20-. They're is chambered in 5.56x45mm NATO.
Kel-Tec RFB Carbine
The Kel-Tec RFB Carbine appears as the SDAR 5.56mm, and is used by all factions, modified into a fictional underwater weapon. It remains visually identical, though. Oddly enough, its selector switch has only two positions marked; safe and fire, albeit the rifle's ability to fire in semi, three-round burst and full automatic modes. To compensate for its selectable settings, the switch will just stop halfway- at the 6 o'clock position, for burst fire.
Mark 14 Mod 0 Enhanced Battle Rifle
The Mk 14 Mod 0 EBR is used by INDFOR soldiers, in the Marksman role. It's known in-game as the Mk 18 ABR 7.62, and is chambered for 7.62x51mm NATO.
The CheyTac M200 is the anti-materiel rifle of the BLUFOR faction, and is labelled as the M320 LRR .408 ingame. It is chambered in .408 CheyTac.
Gepard GM6 Lynx
The GM6 Lynx anti-material rifle is the anti-materiel rifle of the OPFOR faction. It was first demoed at the Gamescon conference, and was licenced from SERO. It's chambered in 12.7x108mm Sovjet.
The VS-121 was released on October 31st, and replaces the Mk14 EBR for OPFOR's marksman. In game, it's known as the Rahim 7.62, and is chambered for 7.62x51mm. It has an erroneous full-auto mode.
Knight's Armament Company Light Machine Gun
The KAC LMG, appearing as the Mk200 6.5mm, is the machine gun available to INDFOR in-game. It features a Magpul UBR stock and can be fitted with various accessories. It fires 6.5x39mm caseless ammunition.
The IMI Negev is the OPFOR medium machine gun, chambered in 7.62x51mm NATO, and appears as the Zafir 7.62mm. It is fitted with a variety of modern furniture, including a FAB Defense stock.
Metal Storm 3GL
The Metal Storm 3GL is the standard underbarrel launcher of NATO forces, mounted on the MX rifle. It fires both single rounds and 3 round magazines, in flare and smoke variants.
The NLAW (British designation for the MBT LAW) is the standard launcher of NATO troops. It is designated the PCML in game.
The RPG-32 appears as the RPG-42 and is the standard OPFOR launcher.
The Rafael Mini-Spike appears as the Titan, in two variants. A normal, AA variant, and a shortened, AT and AP variant. It also comes in tripod mounted variants. It is universal to all factions. The compact version features a small launch tube with a square profile which is taken from the actual Mini-Spike, whereas the standard launcher has a fictitious larger hexagonal tube whilst still using the Command and Launch Unit (CLU) from the Mini-Spike.
Browning M2 Heavy Barrel
The Browning M2HB is seen mounted on the back of the Offroad Technical, used by the FIA faction in-game. It also features as part of the Remote Controlled Weapon System, or the RCWS, alongside the GMG.
Heckler & Koch GMG
The Heckler & Koch GMG is seen as part of the RCWS, and is mounted on a bevvy of Arma 3's vehicles.
The XM312 appears as the Mk30. It's used in tripods, raised tripods, autonomous tripods, and on patrol boats. It's used by the NATO, OPFOR, and INDFOR factions.
The XM307 appears as the Mk32. It's used in tripods, raised tripods, and autonomous tripods. It's used by NATO, OPFOR, and INDFOR factions.
Dillon Aero M134 Minigun
The DA M134 Minigun is seen mounted on the "AH-9" attack helicopter (derived from the AH-6 Little Bird) used by the NATO faction in-game. It's also seen on the Assault Boat, and on the PO-30 Orca OPFOR helicopter.
General Dynamics XM301
The GD XM301 is seen mounted on RAH-66 Comanche attack helicopter used by the NATO faction in-game.
General Dynamics GAU-19/A
The GD GAU-19/A is seen mounted on the "Mi-48 Kajman" attack helicopter (derived from the Mi-28 "Havoc") used by the Iranian Armed Forces faction in-game. It is unclear why the GAU-19/A is featured as the main armament of the Mi-48 instead of the Shipunov 2A42, although this reason could be for ArmA III's futuristic background. It does act like the 2A42, switching from HE to AP without needing to re-chamber.
ZVI Plamen PL-20 2x20mm gun pod
The L-159 Alca comes with an underslung gun pod with dual 20mm cannons.
As of the moment the following weapons have been removed from the game despite being fully functioning in earlier builds. The developers say that they might make their way back in post-release, "maybe".
Benelli M4 Super 90
The Benelli M4 Super 90 appears as the "M4 SASS".
The Kel-Tec KSG is a confirmed weapon to be featured in the game, and can be fitted with various accessories.
Heckler & Koch XM25
The H&K XM25 is a confirmed weapon to be featured in the game.
General Dynamics GAU-22/A
The GD GAU-22/A is most likely the main armament of the F-35B Lightning II used by the NATO faction in-game.