Pistols are included in the Secondary Weapons catergory, also included is an extensive list of all upgrades:
The Beretta M9 is portraied in this game as the M92 Elite II. It is the starting pistol, and the standard issue pistol for all SSC troops. At its base, it has low damage, high accuracy, and low Aggro.
The Heckler & Koch Mk 23 Mod 0 is portrayed in the game as the SOCOM Mk. 23. At its base, it has medium damage, high accuracy, and low Aggro.
The Glock 18 in this game is called the G18C. At its Base, it has high damage, medium accuracy, and medium Aggro. Highly notable is the fact that the G18C fires in a fully automatic configuration similar to an SMG, making it for many players the easiest weapon to score the "dead mans hand" achievement"
The Desert Eagle in this game is called by its common nickname "Deagle" At its Base, it has high damage, medium accuracy, and high Aggro. It is a .50 caliber. You can tell by it's original clip size and the size of the gun when held by Rios or Elliot.
The Smith & Wesson Model 629 is titled in this game as the .44 Model 29. At its Base, it has high damage, medium accuracy, and high Aggro.