Designed by famed Russian Firearms Maker Fedor Tokarev, his 1925 "version" of The US Model 1911 .45 Caliber Pistol, featured several innovations. Weighing just 1.5-pounds, it too was a "blowback", gas operated firearm. Featuring a rounded rear bolt, thus was seen as a way to minimize any possible injuries to the shooter's hand. Originally manufactured to support a 8-round ammunition clip (which fed into the Receiver) for the standard 7.63mm Soviet round then in use, Tokarev switch barrel caliber to support the American .45 Caliber round. This made it one of Russia's best "knock down" weapons produced. Over 600,000 TT-33 were manufactured. It was rated to a minimum range of 200-yards (with a maximum of 509-yards). Although production ceased in 1938, The TT-33 was used heavily in World War II.