This comes up every couple of weeks. Yeah, it's a joke. But it is
a good conversation piece. I have a CZ SP-01 and bought one of these just for giggles (got it for a good price, BTW). My brother-in-law, who is a real gun newbie, thought it was great. It's in 2 parts: the tactical block and the bayonet. The tactical block may, somewhere somehow - maybe in a parallel ...