Some games list this as a submachine gun (BF:BC2), others as an assault rifle (AAO etc).

The M249 exists in most games in two versions: Either the M249 Para or the M249 SAW. The Para is konfigured for paratroopers mainly, this means, it has a shorter barrel, which makes it more easy to use in CQB environment. The SAW (means: Squad Automatic Weapon) is used mainly for supressive fire, the barrel is longer. This makes the SAW more heavy than the Para, but it also gives a better acuuracy when firing in full auto mode.

Pistol from WWII. 1911 pistol (Browning or Colt)

The UZI submachine gun is one of the standard weapons fo Israel's security forces. IMI is the israelic manufacturer.

In Call Of Duty 7: Black Ops this weapon is called "Commando", do not mix this with the SIG551 Commando.

Benelli M4 Super 90 Shotgun Benelli M4 Super 90 ShotgunDifference to M3: the M4 can fire in full automatic mode, the M3 is only single fire.Battlefield 3: M1014 (http://en.wikipedia.org/wiki/M1014)Couterstrike:Source:This shotgun is named YG1265, bind "buy weapon_xm1014"

This submachine gun is one of the most well known bullpop designed rifles. A very special design aspect is the magazine, it is located on top of the rifle, not below. See the videos for details how this works. The cartridge holds 50 rounds. Designed for a shooting distance of 200m, total range is 1800meters though. Differences between the versions: FN P90: original version FN P90 TR: similar to P90 but has a triple rail interface on top of the rifle. This allows to use standard attachments on the submachine gun FN PS90: civilian version: it does not contain the full auto fire mode

Desert Eagle (Magnum) pistol .50 The Desert Eagle exists in a ton of different variants. You can get it with a lot different calibers, a lot of different barel lengths and from a lot different manufacturers. Here you find the most common version in video games: the .50 caliber Desert Eagle, manufactured by Magnum Industries.  

The MP5 has a ton of variants and each can be modified. In games usually you find a submachine gun close to the MP5 A4 or MP5 A2, if a game just says "MP5" we reference to the MP5 A4 then. The variants use the calibers 9x19mm, 10mm Auto (for MP5/10) and .40 Smith & wesson for the MP5/40 gun.

Benelli

In Counterstrike:Source this pistol is named 9X19mm Sidearm. Bindkey for CS:S: bind "buy weapon_glock"

The MP5 SD is very silent. If you watch the videos, you see, that you only hear the sound the mechanic of the weapon does, but not the shooting itself. This is only possible, because the silencer is made as a part of the weapon, not as an attachment.