M50 Reising
The .45 Reising submachine gun was manufactured by Harrington & Richardson Arms Company in Worcester, Massachusetts, USA, and was designed and patented by Eugene Reising in 1940. The three versions of the weapon were the Model 50, the folding... Wikipedia
Designer: Eugene Reising
Action: Delayed blowback, closed bolt
Feed system: 12- or 20-round detachable box magazine, 30-round aftermarket detachable box magazine
In service: 1941–1975
Length: 895.35 mm (35.250 in); 565.15 mm (22.3 in) stock retracted (M55)
Manufacturer: Harrington & Richardson
Maximum firing range: 274 m (300 yards)