The following weapons are used in the Half-Life 2 Modification Zombie Master:
The main pistol in the game is a SIG-Sauer P228.
Taurus Model 617
The revolver in the game most resembles a Taurus Model 617 - chambered in .357 magnum
The Submachine gun in the game is an Ingram MAC-11. It holds 30 rounds in-game.
Winchester Model 1894
The Winchester Model 1894 is the main rifle in the game. Chambered in .357 Magnum.
The main shotgun in the game is the Remington 870