There is a Mossberg 500 in Carl's police cruiser. Monkeys chamber a round and fire a round through the ceiling.
Winchester 1901 Shotgun
Van Pelt (Jonathan Hyde, in a dual role) initially comes out of the game with a modified Winchester M1901 Shotgun rifle, but runs out of ammunition, which cannot be replenished since it hasn't been manufactured since 1903. The shotgun has been modified with a custom stock, a false box magazine and a large tube placed over the barrel in order to make it appear to be a large caliber elephant gun.
Daewoo USAS-12
A Daewoo USAS-12 is used by Van Pelt, who acquires it after convincing the gun shop owner to bypass the mandatory waiting period with a bribe. It is outfitted with a scope, drum magazine, and silencer to make it look like a sniper rifle.
SPAS-12
Van Pelt walks past a prominently displayed SPAS-12 in the gun shop.
Heckler & Koch HK94
A Heckler & Koch HK94 is seen being worked on in the gunshop where Van Pelt acquires the USAS-12.