13mm pistol... It really must take a giant like the corporal to use a monstrous pistol like that. 0.50 Barrett is reported to occasionally cause dislocated bones and ruptured retinae to the shooter. And it's a sturdy rifle. This 13mm pistol is, like the Colt dude pretty much said, not meant for every average man.

I have shot with a 12.7mm heavy machine gun, and it was sitting on a tripod held down by multiple sacks of sand to withstand the recoil...