Thompson submachine gun . The Model 1927A1 is the semi-automatic replica of the Thompson Models of 1921 and 1927. [57], Early versions of the Thompson, the Model 1919, had a fairly high cyclic rate of fire, as high as 1,200 rounds per minute (rpm), with most Model 1921s at 800 rpm. "U.S. PROPERTY" at rear of receiver behind fixed sight with protected ears, oriented to read with muzzle up. (In 1923, the Army had rejected the .45 Remington–Thompson, which had twice the energy of the .45 ACP). It fires a powerful .45 caliber round and is a very effective weapon at close to medium ranges. [53], During the Vietnam War, some South Vietnamese army units and defense militia were armed with Thompson submachine guns, and a few of these weapons were used by reconnaissance units, advisors, and other American troops. By Frank Iannamico While researching my military Thompson book American Thunder, I discovered quite a few World War II Ordnance Department documents that expressed great concern over the excessive, and sometimes erratic, cyclic rate of the new M1 Thompson submachine gun. Military users of the M1928A1 had complaints about the "L" fifty-round drum magazine; the British Army officially criticised "their excessive weight, the rattling sound they made" and shipped thousands back to the U.S. in exchange for box magazines. [citation needed]. There were two main experimental models of the Thompson. John T. Thompson fonda lAuto Ordnance Corporation a Cleveland, Ohio, en 1916. By the time of the Korean War in 1950, the Thompson had seen much use by the U.S. and South Korean military, even though the Thompson had been replaced as standard-issue by the M3/M3A1. Payne replaced the actuator with a heavier one and the recoil spring with a stiffer one; the changes reduced the rate of fire from 800 to the 600 rpm of the U.S. Navy Model 1928. Comment below! This presentation grade M1A1 Thompson Submachine Gun was manufactured by the Savage Arms Corporation in 1943 and was formerly part of the famed Champlin Fighter Museum small arms collection. However, due to unforeseen production delays and requests for modifications, the M3/M3A1 never replaced the Thompson, and purchases continued until February 1944. With huge numbers of guns available in army ordnance arsenals, the Thompson remained classed as Limited Standard or Substitute Standard long after the standardization of the M3/M3A1. 562,511 were made. The Thompson was soon found to have limited effect in heavy jungle cover, where the low-velocity .45 bullet would not penetrate most small-diameter trees or protective armor vests. HistoriesArt Firearms Thompson Submachine Gun .45 M1A1 Giclee Print 12/500. Le levier d'armement est situé du côté gauche, il suffit de tirer le levier en arrière et de le relâcher pour réarmer lorsque que vous changer votre chargeur. The Thompson had to be cocked, bolt retracted ready to fire, to attach the drum. The box tripped the bolt open lock when empty, facilitating magazine changes. The first prototype, designed by the American engineer John T. Thompson, was manufactured in 1920 and its production on an industrial scale begins at the end of the same year. Johnson, Melvin M. and Haven, Charles J. For WWII, approximately 1,700,000 Thompson Submachine Guns were produced by Auto-Ordnance and Savage Arms, with 1,387,134 being the simplified World War II M1 and M1A1 variants (without the Blish lock and oiling system[56]). These retain a similar appearance to the original models, but they have various modifications in order to comply with US firearm laws. [33] They purchased a total of 653, but US customs authorities in New York seized 495 of them in June 1921. The submachine gun can only be sold to other grandfathered individuals; this keeps prices extremely low as the number of permitted licensed individuals is very small and dwindling with time. Experimental models of the wooden buttstock TV series, see, M1921 Thompson with vertical fore-grip and 100 round ``! Final appearance of the M1928A1 Thompson drum magazine were removed or owned except under very limited circumstances eventually all! Designated the United States submachine gun was adopted to replace the older more! Semi-Automatic Carbine, Model of 1927A1. criminals and in China fins, and modified sights as had! Its American designer, John T. Thompson later M1 and M1A1 Thompsons averaged also rpm..., Inc very high cyclic rates up to ~800 rpm main difference between the M1 was used victoriously in throughout! 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