is it legal to make a hidden blank firing adapter(BFA)? i know that the military uses the big gaudy ones for a reason. Lets say for honor guard(HD) you want things to look sharp and realistic correct? I want to design a hidden BFA. so it would make the illusion of firing rounds more realistic instead of having to manually load each round -> yeah some people think that the 3 count is nice looking.
would this be illegal? i cant seem to find any guidance online other than hearsay. the movies use them for illusion why cant i?
i imagine it would be ridiculously easy to make... just make a "flash suppressor" that plugs the barrel