Continuity mistake: Don Rickles is assembling the .30 calibre machine gun onto its tripod prior to the action in the French village. Neither he nor his co-gunner have any visible anmmunition. The scene changes, the comes back to the .30 calibre machine gun, which is set up on its tripod and is loaded with a belt of ammunition. Where did the ammunition come from?
Continuity mistake: When the guys are making a "deal" with the tiger tank commander, Big Joe's left hand on the muzzle of the tigers gun changes positions between shots.
Answer: It's a Yugoslav Soko 522 Ikarus.