could used an empty round... my point was so long as there's nothing but plastic it is undetectable, put a round in it that can either be seen on a scanner or sniffed by it's powder and it's a whole other story could used an empty round... my point was so long as there's nothing but plastic it is undetectable, put a round in it that can either be seen on a scanner or sniffed by it's powder and it's a whole other storyCould conceivable use a paper cartridge and glass or ceramic bullet...