SOCOM pistol 

Known to USSOCOM (United States Special Operations Command) as the Mark 23, Mod 0. It is the pistol of choice for U.S. Special Forces. It uses .45 ACP (automatic colt pistol, for those of you not in the know). It also comes with a Knights flash and sound supressor and a laser aiming module. It has a 150mm barrel(5.9 inches) and is capable of match-grade accuracy. It is not very popular with Special Forces, being that it is very large, rivaling a Desert Eagle in size.

Solid Snake uses a SOCOM, and you should too.

SOCOM pistol by Galloping Ghost June 12, 2005

SOCOM pistol 

The popular name for the Heckler & Koch United States Special Operations COMmand Mk23 Mod 0 Offensive Handgun Weapon System. Featured in Metal Gear Solid and Action Quake 2.

With a name like that, it's no wonder it's known as the SOCOM pistol.

SOCOM pistol by Stan April 11, 2006