stiiggy

Question: Could you really use tracer rounds in the type of machine guns the Germans were firing during the Normandy scene at the beginning of the movie, as seems to be the case?

Answer: Absolutely. There were tracer rounds in ammo belts for the MG42.

lionhead

Could you fire incendiary rounds as well?

Yes, an MG42 can fire incendiary rounds.

lionhead

Incendiary rounds and tracer rounds are the same thing.

stiiggy

No, they're not. In WWI they were the same phosphorus rounds but later tracer rounds carried a lot less flammable and volatile substance than incendiary rounds.

lionhead