I was lucky enough to meet a kind gentleman that allowed me to fire a magazine through a beta testing MAX-11/15 LAGE upper on a full auto MAC Submachine gun. This upper effectively turns the sub gun into an ersatz full auto 5.56 PMAG adaptor. It was a blast to shoot and was actually quite controllable. These aren't on the market yet but are going to be soon (the upper of course not the registered machine gun lowers :) )
