The M3 submachine gun, also known as Grease gun, was developed as a cheaper war-time alternative to famous Thompson M1 and M1928 submachine guns. The basic requirements were set by US Ordnance Corps in February, 1941. The George Hyde and Frederick Sampson, working together at Inland Division of general Motors Corp developed a prototype, which was designated as T20. This was a very simple weapon, made mostly from steel stampings. In November 1942 T20 was tested against several other prototypes, and was found superior to all other contestants. Late in 1942 the T20 was recommended for adoption, which followed in 1943. Combat use of a newly adopted M3 submachine gun showed some problematic points in design, most notably in cocking mechanism. The problems were solved by elimination of this unit, which was done in 1944. The further simplified weapon received designation M3A1, and served with US Armed forces through the later part of WW2, Korean and Vietnam wars. M3A1 was issued to US tank crews up until 1980s. Operation Fully Automatic, Blowback Caliber .45 (11.4 mm) Muzzle velocity 280 mps (920 fps) Ammunition .45 ACP, 230 gr bullet, 5 gr charge Capacity 30-round detachable box magazine Weight 8 lbs Overall length 2ft 5.8in, stock extended 1ft 10.8in, stock retracted Rate of fire 350-450 rpm Effective range 50m (55yds)
![-=[ UP ALL NIGHT ]=-](styles/fracture/xenforo/UAN_Logo.png){kind=logo}