Him and a few more sadly . Remember a show about a agent posing as a model (not a bad show really) but 1st or 2nd season playing around and shot himself in head and died . Also after Lethal Weapon , people would due that one scene with blanks with bad results . Sorry Bobby getting off on rabbit trail here .
When I was in the U.S.Army (79-82) those blanks were used for the M60 Pig, but a blank adapter was needed to get the Pig to cycle, but fire 500 + rounds of those blanks and the adapter would loosen and fall off and it would keep rocking and rolling without the adapter. I never seen the M240 fire those though because that machine gun was only used in M60-A3 tank as the coax gun.