I have a 1981 COBRAY M10 “MAC-10” 9mm SUBMACHINE GUN that fires open bolted Made by RPB INDUSTRIES, INC. Atlanta GA. U.S.A. It has original 2-32 rounds mags, speed loader and owners manual. This gun has been shoot very times. It was left to us by my wife’s grandfather. Who got it in Atlanta Georgia where it was originally factory made. I’ve shoot one mag through it just to see how the open bolt fired. It shoots great and no malfunctions. Would make a good collection gun or could be turned into full auto. Will take $5500 or best offer. You can contact me REDACTED/p>