I found a small lot of Dynamit Nobel carbine blanks in '94. They have a brass head and red plastic body with a round nose for feeding. I also had one of those European BFA's you're talking about. Everything worked together fine. I did this because I was doing the reenactment for the 50th anniversary of D-Day that they put on at Ft. Story VA. That was my first and last reenactment. The guys acted like children playing army. I was looking at it like an acting gig where you're not 'on' until the curtain goes up. Anyway, since there are no US blanks and the US never standardized the BFA, there's no need to have one with your display of US Carbines.