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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]
Rebated-rim cartridges are known to be used on firearms using advanced primer ignition (API blowback) for its operation, notably autocannons such as the 20 mm Becker/Oerlikon series. [1] API blowback firearms have straight-sided chamber walls as possible (and sometimes slightly bottlenecked) to contain the cartridge and allow a deeper chambering.
Submachine gun: 1943 Garanin general-purpose machine guns: 7.62×54mmR Soviet Union: General-purpose machine gun: 1957 MAC-58: Manufacture d'armes de Saint-Étienne.50 BMG France Heavy machine gun: 1958 San Cristobal Carbine: Armería San Cristóbal Weapon Factory.30 Carbine Dominican Republic: Carbine: 1950 ST Kinetics CPW: ST Kinetics: 9× ...
Blow forward (left) vs. blowback (right) operation. The Mannlicher M1894 pistol, the first blow-forward firearm.. Blow forward is a firearm action where the propellant gas pressure and the friction of the bullet traveling down the bore drag the whole gun barrel forward to facilitate the opening of the breech. [1]
This principle of metallic adhesion of dissimilar metals became known as the Blish principle. Blish put this theory to use in a delayed-blowback breech mechanism. He developed a working model that used a simple wedge as the delay mechanism, and was eventually assigned U.S. patent 1,131,319 on March 9, 1915.
This is a list of advanced primer ignition blowback firearms (API). Assault Rifles. Name/ designation Year of intro Country of origin Primary cartridge Type APT:
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Blowback (intelligence), unintended consequences of a covert operation that are suffered by the civil population of the aggressor government; Blowback (forensics), vacuum effect created in the barrel of a firearm when it is discharged; Blowback, firearm discharge materials a concern for Shooting range#Common safety practices