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.
The Karabiner 98k can be seen in the hands of the East Germans.
Error creating thumbnail: File missingKarabiner 98k - German manufacture 1937 date - 7.92x57mm MauserError creating thumbnail: File missingA quite brutal scene greets Nick Rivers as he enters East Germany. Here, German soldiers with Karabiner 98k's apprehend, and later execute, a guy carrying a suspicious package, which is later revealed to contain dog biscuits...
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.
The gun in this picture looks to me like a Beretta 92F, however the film is set around WWII and the 92F was not designed until 1972 so it could just be a movie mistake and they were not careful to use guns and other weapons from that era.
Unknown revolvers
Error creating thumbnail: File missingNigel, holding a silver pearl-handled revolver, takes up position near a mostly-broken window.Error creating thumbnail: File missingIn an obvious satire of old B-Movie westerns and gangster movies, Nigel goes for the one unbroken window, smashes it with his revolver and shoots through that. (In reality smashing ALL of the panes allows you one less obstruction to a target and keeps the enemy's fire from hurling glass shards at you when their fire smashes the pane.)Error creating thumbnail: File missingDéjà Vu (Jim Carter) tries to break a window using a revolver, only for the barrel to bend.
Cannon
Chocolate Mousse (Eddie Tagoe) uses a muzzle-loading field cannon during the attack on the French Resistance's headquarters.
