Left 4 Dead 2
The following weapons appear in the video game Left 4 Dead 2:
SIG-Sauer P220 SAO
A custom SIG-Sauer P220 is now one of standard handguns for the Survivors. It says "Triaton P220" on the slide, and is actually modeled after a P220 SAO (sans the beavertail) with a slightly shorter than standard slide and barrel. The gun also features a custom reverse two-tone finish, custom sights, and an underbarrel LT-TLP08 tactical flashlight.
A Glock 26 pistol is used as the second handgun for dual wielding. It has a short grip of the Glock 26 and slide shape but its slide and frame are stretched to the length of a standard sized Glock like the Glock 17. It does not have a mounted flashlight on it. It goes for $999.99, and a buy one get one free sale, in the gun store.
The Desert Eagle has more recoil and a slower rate of fire than the standard sidearms, but has much more stopping power and greater accuracy. The pistol holds 8 rounds like the .44 Magnum version, even though it is modeled after the .50 caliber version. This weapon usually kills common infected with a single shot. When found in Whitaker's Gun Shop, a sign names the pistol "Desert Cobra," and the game claims that only 2000 were ever made and prices them at 2000 dollars apiece.
Interestingly, its flashlight is attached via a rifle scope ring mount and an aftermarket underbarrel rail.
Remington 870 Police Magnum Riot
A similar shotgun like the "Renegade Rangemaster" from the first game appears in this game, but has a new model. It now resembles the Remington 870 Police Magnum Riot Shotgun, but it still has a Ithaca 37-like magazine tube. Whitaker prices it a $399.99 in his store.
Remington 870 Marine Magnum
Remington 870 Marine Magnum is seen with a Mariner NP3 finish. It has a ventilated rib and ghost ring sights. It has a tighter spread than the default shotgun, but deals slightly less damage. It has the tightest spread of all of the shotguns, which makes it more effective at distance shots compared to the other shotguns. Goes for $399.99 in the gun shop.
Benelli M4 Super 90
The shotgun from the first game which is another Second Tier weapon, the Benelli M4 in game has a 10-round capacity (despite being modeled with a 4-shot tube: the normal capacity of the M4 is 7 rounds, with anything more requiring an aftermarket magazine tube extension. For 10 rounds the extension makes the magazine tube somewhat longer than the standard barrel and looks ridiculous) and a flashlight clipped to the barrel right in front of the handguard. Whitaker priced it at $1999.99 and calls it a fully automatic 12 gauge.
The Franchi SPAS-12 is the second auto-shotgun available to the players, It carries 10 rounds while the real one has a max capacity of 8 and unlike other Valve games, it's fired in its semi auto mode. It has the tightest spread and does more damage per pellet than its counterpart, but to compensate, it shoots less pellets per shell. Cost $1999.99 and claimed to be banned in 25 states.
The MAC-10 ingame is fitted with the legendary Mitchell Werbell suppressor, along with a flashlight attached to it with zip ties, and is chambered in .45 ACP, evidenced by the fact that it does more damage and has more recoil than the Uzi. The MAC-10 has an incorrect 50-round magazine (instead of the real 30) with a extra 650 rounds in reserve.
Like its Counter-Strike incarnation, the MAC-10 in this game has a strap attached to the barrel to serve as a makeshift foregrip, but for some reason no characters actually use it ingame, preferring instead to put their offhand just in front of the trigger on the underside of the weapon (as they do with the ingame Uzi). A graphical error with this weapon still makes it emit light from the muzzle blast (thought not the actual muzzle flash) when fired in First Person perspective, and the muzzle flash is still unrealistically unsuppressed when looking at characters firing the weapon from the third person perspective. Goes for $399.99 in the gun shop and referred to as a machine pistol.
The Uzi from the first game. It is the same full-sized First Tier Uzi using a 50 round magazine (modeled after the 32 round one) with a flashlight taped to its handguard. Cost $399.99 in the gun store.
The Ruger Mini-14 hunting rifle has been carried over from the previous game.
Hip accuracy has been significantly increased compared to the L4D1 version, in fact it is the most accurate weapon on the move in L4D2. With a laser sight it is even more accurate on the move than any SMG. It is also slightly more accurate than the Sniper Rifle. It has a capacity of 15 rounds even though it is modeled with a 10 round magazine. Went for $399.99 in the gun shop.
The M16A2 from the first game appears in Left 4 Dead 2. Though it says "M16 A2" on the lower receiver, It fires in full auto like the M16A1 or M16A3. It appears to have the highest rate of fire out of all the assault rifles and it still has a unrealistic magazine capacity of 50 rounds, 20 of which are apparently found in an invisible extension of the stock 30 round STANAG magazine. Went for $1999.99 in the store.
The AKM has a 30-round magazine that somehow holds 40 rounds, which is 10 less than the M16 and 20 less than the SCAR-L, but still 10 more than is physically possible to fit in the 30-round magazine the AKM is depicted as carrying. It also has the lowest rate of fire of the assault rifles, but makes up for that by doing very good damage to the Infected.
Its identified as an AKM by its muzzle compensator, stamped steel receiver, night sight mounting bracket on the left side and plastic 7.62x39mm, 30-round magazines. However, the ingame 40-round capacity is in fact possible in real life by using RPK magazines, though doing that makes the weapon rather bulky. Like the MAC-10, it has a flashlight secured via zip ties to the handguard of the weapon. Went for $1999.99 in the store.
The FN SCAR-L is called the "Desert Rifle" or "Combat Rifle" in-game and holds an unrealistic 60 rounds of ammunition despite the fact that it's modeled with a 30 round STANAG magazine (same as the M16's, though it appears much larger, due to generally screwed up proportions of the gun's model), and fires in a three-shot burst (which real SCAR-Ls do not have). Although if you keep the trigger depressed, it will fire successive three-shot bursts without the need to pull the trigger again. It also has very high accuracy and does more damage than the M16. In addition, The SCAR-L in the game seems to be modeled after the FN SCAR 16S, a civilian version of the SCAR-L with a 16" barrel and a M16A2 flash-hider, but oddly, it has "Mk.17" markings on the side of the weapon (denoting the SCAR-H). Went for $1999.99 in the store, which also calls it as a 5.56mm combat rifle, confirming it's supposed to be a SCAR-L.
Heckler & Koch G3SG/1
The Heckler & Koch G3SG/1 serves as a long range weapon like the Ruger Mini-14 from the first game. It is modeled after the H&K G3SG/1 sniper rifle (or a scoped HK91 given the absense of a paddle magazine release), with some features from the H&K MSG90A1, namely the stock, trigger group, and barrel length, but it also has the AK-74 muzzle brake (perhaps even from an AK-103, which also has 7.62mm bore diameter). Its magazine holds 30 rounds (even though it's modeled with a 20 round magazine), which is double that of the previous hunting rifle. Cost $1999.99 in the gun shop, where it is also featured in a picture with the US flag in the background, presumably indicating it is an American G3 clone, the PTR-91.
The AK-74M appears in several concept arts and in-game campaign posters. It is worth noting that developer commentary says that the in-game AK-47 is partially AK-74, indicating that AKM might have replaced AK-74M at some point in development.
(Art) CQB-R / Mk. 18 Mod 0
The CQB-R / Mk. 18 Mod 0 appears in several concept arts and in-game campaign posters. It also appeared in several concept arts/posters for the previous game. This may or may not be the same model as Counter-Strike: Global Offensive Mk. 18, known as "M4A4" in that game.
GE M134 Minigun
The GE M134 Minigun from the first game returns in The Sacrifice DLC, used in campaigns where the players control the original Survivors. The time needed to spool up the barrels and start firing seems to be slightly decreased.
M60 machine gun
The M60 machine gun is only available in The Passing and No Mercy DLC (it may be in the Sacrifice). It carries only 150 rounds and, after being depleted, is dropped (that's right, no reloading). The Survivor will then revert back to their secondary weapon, much like with the Grenade Launcher. There is an Achievement called "Till it Goes Click" (a reference to The Big Lebowski), which requires the player to mow down 25 infected without letting go of the trigger.
M79 grenade launcher
The M79 grenade launcher acts as a single-shot, area-effect weapon, it must be reloaded after every shot and the wielder must pay particular attention not to hurt themselves or their teammates with the explosion.
It comes with 30 grenades plus one already in the weapon, it can kill a Tank in only 2-5 hits (on Normal difficulty), and has almost no arc, unlike most games including HL2. It can also use incendiary and fragmentation rounds if incendiary or fragmentation ammo boxes are used, and for some bizarre reason, you can also put a laser sight on it.
Because of the strict censorship in Germany (and also in Australia and elsewhere in the world), Valve decided to add 4 Counter-Strike: Source weapons. Players are able to use them even in non-German versions of the game if they play with someone with the German version or in custom campaigns set to spawn them. Players can also use these weapons via cheat in the console but they will deal no damage unless the map is restarted or they are carried through to the next map via safe room.
Heckler & Koch MP5N
The MP5N has a lower rate of fire than the normal SMGs in the game, but it has a slightly higher accuracy than Uzi while its damage is the same as the MAC-10. Like all SMGs in the game, it has a 50-round capacity, incorrect for this weapon instead of the real 30.
The Steyr Scout with an extended magazine adapter has lower rate of fire than other sniper rifles in game, but good accuracy. Erroneously holds 15 rounds instead of 10.
Accuracy International AWSM
The Accuracy International AWSM has the slowest rate of fire (excluding the Grenade Launcher) in the game but inflicts a high amount of damage per shot. Incorrectly holds 20 rounds instead of 5.
SIG SG 552
The SIG SG 552 has a 2x scope and two rates of fire, determined by whether the scope is in use. Without looking down the scope, it has the highest automatic rate of fire out of all assault rifles. Incorrectly holds 50 rounds instead of 20.