Colonel Von Horst (Warren Clarke) uses a Walther P38 to threaten Nick after he smarts-off in German. Sergeant Kruger (Jack Cooper) also uses one to shoot an informant later.
Chocolate Mousse's (Eddie Tagoe) weapon is an M1928 Thompson. During one scene, Chocolate Mousse "loads" his weapon like a musket, even pouring gunpowder and using a ramrod.
MP40
The MP40 is seen quite frequently in the hands of the East Germans and the French Resistance.
The Karabiner 98k can be seen in the hands of the East Germans.
M1 Garand
Deja Vu uses an M1 Garand. Also, in when the East Germans attack the Resistance headquarters, a German soldier, for some reason, is using an M1 Garand.
M1 Carbine
An M1 Carbine can be seen in the hands of at least one of the French Resistance fighters.
Miscellaneous Shotguns
During the "Skeet Surfin'" scene near the beginning of the movie, the surfers can be seen with a variety of shotguns.
Unknown automatics
Numerous automatic pistols are used throughout the film.
Unknown revolvers
Cannon
Chocolate Mousse (Eddie Tagoe) uses a muzzle-loading field cannon during the attack on the French Resistance's headquarters.