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Mainspring on a bolt-action rifle (marked with C) In firearms , the mainspring is a spring in the firing mechanism which stores the energy required to ignite the primer of the cartridge . [ 1 ] The mainspring may be called a striker spring [ 2 ] on striker-fired firearms, or hammer spring [ 3 ] on hammer-fired firearms.
The Arsenal Firearms AF2011-A1 is a double-barreled, semi-automatic pistol of Italian origin. The weapon is a derivative of the M1911 pistol and the majority of internal parts including the firing pins, firing pin plates, sear groups, springs, recoil rods, and mainspring housings are interchangeable with standard M1911 replacement parts. [4]
The Rock Island Armory 1911 series is a product line of single-action recoil operated semi-automatic pistols. They are designed and manufactured by Armscor in Marikina , Philippines , [ 1 ] and distributed in the United States by Armscor USA, located in Pahrump, Nevada .
The Remington 1911 R1 is a semi-automatic pistol modeled after the classic Colt 1911 which has served the US armed forces for over 100 years. Like the Colt 1911, the Remington 1911 is single action only, and has a grip safety and a manually operated thumb safety ; it also has a Colt Series 80 style firing pin safety .
The Model No. 3 is a Colt Commander-sized 1911 also chambered for .50 GI, with a shorter barrel but with a full-length grip. The M3 can also be fitted with a model-specific version of the company's .45 ACP conversion unit. Like its bigger siblings, the M3 magazines hold 7+1 rounds of .50 GI and 8+1 rounds of .45 ACP.
The Colt Officer's Model or Colt Officer's ACP is a single-action, semi-automatic, magazine-fed, and recoil-operated handgun based on the John M. Browning designed M1911.It was introduced in 1985 as a response from Colt to numerous aftermarket companies making smaller versions of the M1911 pistol.
The Model B has several key functional differences: it lacks the grip-mounted safety present on the 1911, and the backstrap is non-removable and does not feature the mainspring housing like the Colt does. Stars also feature a hinged trigger and external extractor, as opposed to the Colt's straight trigger and internal extractor.
The .50 GI (12.7×23mmRB) pistol cartridge was developed by Alex Zimmermann of Guncrafter Industries. The .50 GI was introduced at the 2004 SHOT Show alongside the Guncrafter Industries Model No. 1 , a variation of the M1911 .