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The Steyr M1912, also known as the Steyr-Hahn, is a semi-automatic pistol that was developed in 1911 by the Austrian firm Steyr Mannlicher.The design was based on the rotating barrel locking mechanism of the Roth–Steyr M1907 but replaced the external striker with a spur hammer ("Hahn") and simplified disassembly to allow for field stripping under adverse conditions.
A barrel chamber with pressure relief ports that allows gas to leak around the cartridge during extraction. Basically, the opposite of a fluted chamber, as it is intended for the cartridge to stick to the chamber wall making a slight delay of extraction. This requires a welded-on sleeve with an annular groove to contain the pressure. [8]
The pistol can be "field stripped" by partially retracting the slide, removing the slide stop, and removing the barrel bushing. Full disassembly (and subsequent reassembly) of the pistol to its component parts can be accomplished using several manually removed components as tools to complete the disassembly. [citation needed]
RIA (Rock Island Armory) 1911s are derivatives of the US Military G.I. M1911-A1, the standard issue US Service pistol from 1911 to 1985. [3] Most RIA models are targeted at the low-end price point of the 1911 pistol market and are basic entry-level MIL-SPEC versions of the 1911. [4] However, some models offer additional higher-end features.
The main differences from a full-sized M1911 are 6-round magazines not 7-round, 7 1/8" overall length not 8 1/2", 5 1/8" height not 5 1/2", 34-oz not 39-oz, and most characteristically 3 1/2" barrel not 5". An evaluation example tested by the Technical Staff of the National Rifle Association fired 300 rounds with few difficulties. [4]
SIG Sauer of Newington, New Hampshire, manufactures a full line of 1911 styled handguns.The earliest models were very faithful to the John M. Browning designed Colt M1911 Pistol which became the United States standard sidearm and served in that capacity for some seven decades before being replaced by the Beretta M9 handgun.
It initially produced only a variant of the 1911 pistol (the BUL M-5). Later it began producing the BUL Storm and BUL Cherokee series of pistols, both CZ 75 variants. The Storm and Cherokee are chambered only in the 9mm Parabellum while the M-5 is chambered in 9mm Parabellum , 9x21, 9x23, .38 Super , .40 S&W , and .45 ACP .
SR1911: features a full length 8.67" slide with a 5" barrel, a standard magazine capacity of 8+1 and a weight of 39 oz. Constructed from low-glare stainless steel.; SR1911 Commander (SR1911CMD): has a shorter overall length of 7.75", shorter barrel length of 4.25", reduced magazine capacity of 7+1, and lighter unloaded weight of 36.40 oz.