A Mark I Welrod Pistol, can used for stealth kills at close range. The weapon is incorrectly depicted with the front sight at the muzzle rather than halfway along the weapon, a configuration only found on a Mark II.
The Arisaka Type 99 is added by "The Landwehr Canal Pack" DLC. The choice of the Type 97 is odd, as the entire game takes place in the European Theater, however it is arguable that an elite operative on such an operation would be able to choose any gear they so wished.
The Sturmgewehr 44 is added by "The Landwehr Canal Pack" DLC as the MP44. It's accuracy is relatively poor, and as ammunition can't be found on dead foes, it is a poor choice.
The Blyskawica submachine gun is added by the St. Pierre DLC. An improved Polish modification of the simple British Sten manufactured in secret underground factories in the Warsaw Ghetto by the Polish resistance. Less than 1000 were ever made, so it would be extremely unlikely that any could be aquired by the allies. It performs similarly to the Thompson, only with better accuracy and less recoil, making it a superb choice.
German Model 24 StielhandgranateFile:M24Loadout.jpgModel 24 Load-out imageFile:M24sev2.jpgHere we see the arc reticle that appears when the player throws a grenade. Also visible is an F-1 Grenade on Fairburne's belt.
F-1 hand grenade
Found in 4th mission, more powerful but less throwing distance.
The Japanese Type 97 grenade is used in game as a booby trap. The choice of the Type 97 is odd, as the entire game takes place in the European Theater, however it is possible the developers wanted to visually differentiate trip mines from the other grenades.
Found in mission 7 and 9, the Panzerfaust is a German, single shot, anti-tank weapon. It cannot be unlocked, and fills up the secondary weapon slot when picked up.
In some of the missions which feature Russians, Lee Enfield rifles can be seen propped up against crates in Russian camps. It is unusable, cannot be picked up or unlocked (it is also worth mentioning that the Lee Enfield was most likely intended to be part of the game, as sound files for it can be found in the game's directory).