I once had an exact STG 44 replica that was chambered in 22lr. The exact same weight as a real one and made in Germany by GSG, ATI German Sporting Guns.Pretty much only a cool looking toy which i kept for about a year, then i traded it off at a gun show. Some of those GSG guns are remarkably well built and accurate, in both the looks and for hitting the target. Even the magazines were made of metal. But of course the ammo didn’t weigh as much as a real one. But with a 22 barrel it was close. They also make an MP40 a WW2 German sub machine, i haven’t ever seen one of those though.