So i went to the annual D-Day re-enactment in Conneaut, Ohio today. Full scale beach landing with amphibious landing craft, air support, artillery, the whole works. Over 1,500 re-enactors took part. My son is becoming a bit of a history buff, it was fun watching everything unfold, answering his questions, the whole day was a blast. Anyway, I have a question. I saw muzzle flash on every rifle and pistol that I could see fired. Tens of thousands of rounds. Fired from Mauser rifles, P-08 Lugers, BAR, M1, M3, MP40, name a WW2 small arm and there was at least one there, usually several in view. What is the procedure used to A) make these capable of firing blanks reliably and repeatably and B) alter them so there is no chance of a live round making its way into an ammo can. I'm sure somebody on this forum knows. And in case you were curious, a German 88mm gun is very loud.