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In September 2011, Glock announced a recoil spring exchange program in which the manufacturer voluntarily offers to exchange the recoil spring assemblies of its fourth-generation pistols (with the exception of the "subcompact" Glock 26 and Glock 27 models) sold before 22 July 2011 at no cost "to ensure our products perform up to GLOCK's ...
[46] [47] They feature exposed hammers, a traditional double-action trigger mechanism, [48] a single-stack 8-round magazine (for .32 ACP version), and a fixed barrel that also acts as the guide rod for the recoil spring. The Walther PP and smaller PPK models were both popular with European police and civilians for being reliable and concealable.
The weight, which tilts downwards during recoil, provides the same functionality of inertia as a slide on conventional pistols. By the time the bolt and barrel separate, the pressure inside the barrel will be at safe levels. A recoil spring pulls the bolt back into battery and strips a round off the magazine on its return, ready for firing. The ...
In addition to 9×19mm Parabellum and .45 ACP, they can also be chambered in .40 S&W (using Glock 22 magazines), 10mm Auto (using Glock 20 magazines), or .357 SIG (using Glock 31 magazines). A variant chambered for 9×21mm IMI that feeds from standard 9×19mm Glock 17 magazines is available for the Italian civilian market.
Long recoil operation is found primarily in shotguns, particularly ones based on John Browning's Auto-5 action. In 1885 a locked breech, long recoil action was patented by the Britons Schlund and Arthur. [9] In a long recoil action, the barrel and bolt remain locked together during recoil, compressing the recoil springs.
In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. [3]
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Handguns converted to .40 Super include the S&W 4506, Glock 21, Glock 30, SIG P220, FNH FNP-45, FNH FNX-45, HK USP, Tanfoglio Witness and the 1911 Government Model (and its variants). Handguns set up for the .45 Super cartridge only need a barrel swap. Handguns chambered for the .400 Cor-Bon can have their barrels rechambered to .40 Super.
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