ah, the russian PPSH, fitted with either the faster to remove 35 round magazine or the large and destructive 71 round drum mag. With a round rate that would take 3 seconds to make the gun go click, with the 71 drum, its a weapon that, for lack of better words, puts the machine in SMG.

a little bit of correction, PPSh smgs reaches up to 1250 rounds per min on average