| U.S. Submachine gun, Caliber .45, M2[1] | |
|---|---|
 M2 Hyde SMG | |
| Type | Submachine Gun |
| Place of origin | United States |
| Service history | |
| Wars | World War II |
| Production history | |
| Designer | George Hyde,[1][2] Frederick Sampson[2] |
| Manufacturer | Marlin Firearms |
| Produced | 1942–1943 |
| Specifications | |
| Mass | 9 lb 4 0z (4.19 kg)[3] |
| Length | 32 in. (813 mm)[3] |
| Barrel length | 12 in. (305 mm)[3] |
| Caliber | .45 ACP[3] |
| Action | Blowback |
| Rate of fire | 570 rounds per minute[3] |
| Muzzle velocity | 960 ft/s (292 m/s) |
| Feed system | 20 or 30-roundThompson submachine gun box magazines |
TheHyde-Inland M2 was a United States submachine gun design submitted for trials atAberdeen Proving Ground in February 1941. Work was undertaken byGeneral Motors Inland Manufacturing Division to develop workable prototypes ofGeorge Hyde's design patented in 1935 (U.S. patent 2049776A). The model first submitted for trials in April 1942 was designated theHyde-Inland 1. Trials revealed the design was superior to theM1 submachine gun in mud and dirt tests, and its accuracy in full-automatic firing was better than any other submachine gun tested at the time. An improvedHyde-Inland 2 was designatedU.S. Submachine gun, Caliber .45, M2 as a substitute standard for the M1 Thompson in April 1942. As Inland's manufacturing capacity became focused onM1 carbine production, the US Army contracted M2 production toMarlin Firearms in July 1942. Marlin began production in May 1943. Marlin's production failed to match the trials prototype performance;[3] and Marlin's original contract for 164,450 M2s was canceled in 1943 upon adoption of theM3 submachine gun.[4] The M2 is chambered for the .45 ACP cartridge and used the same 20- or 30-round magazine as the Thompson. Its cyclic rate of fire is 570 rounds per minute. None of the approximately 400 manufactured were issued by any branches of the United States military.[3]
The M2 is a simple blowback operated design, although it was difficult to make. The receiver was built from a steel forging and a seamless tubular section, which took extra time and effort to machine and finish, causing the US Army to adopt the M3 with a simple stamped sheet metal receiver instead. Like the AmericanThompson and FinnishSuomi designs, the M2 bolt was shaped with large diameter rear and slender front sections. Unlike the all metal M3 with a collapsing wire stock, the M2 had a fixed wooden stock with wooden handgrip and handguard.[5]
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