This is an excellent WWII era Harrington & Richardson Reising model 50 fully automatic SMG. These weapons saw limited used with the United States Marines in the Pacific as a substitute for the M1 Thompson. However, they were more widely used as defensive weapons for war-essential industries and law enforcement agencies. The top of the receiver has the three-line Harrington-Richardson factory markings, with the fire control and serial number on the rear right side. The barrel is fitted with a combination, flash hider/muzzle break with 14 cooling fins on the barrel. It has a blade front and a stamped, sheet metal four position adjustable rear sight. The breech end of he barrel is stamped with "2/PM" indicating the barrel was proofed fired and checked during assembly. It is fitted with a one-piece walnut buttstock with a small 1 1/2 X 1 inch property decal on the right side, which reads: "PENNA. STATE POLICE/PROPERTY TICKET NO. /052907". It has a cocking lever on the underside of the forend. This weapon includes one original Reising marked Model 50 20 round stick magazine.