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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.
The energy created by larger and higher pressure cartridges, such as 9×19mm Parabellum pistol cartridge, results in violent movement of the gun's action. In the case of simple blowback (and delayed blowback) the changes needed for a firearm to be able to control the higher amount of inertia and higher chamber pressures resulted in firearms ...
Simple blowback action is simple and inexpensive to manufacture, but is limited in the power it can handle, so it is seen on small caliber weapons such as machine pistols and submachine guns. Lever-delayed blowback, as seen in for example the French FAMAS assault rifle, can also handle more powerful cartridges but is more complicated and ...
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.
Download as PDF; Printable version ... This is a list of advanced primer ignition blowback firearms (API). Assault Rifles ... Hybrid of API Blowback and short-recoil ...
Rotating bolts are found in delayed blowback, gas-operated, recoil-operated, bolt action, lever-action, and pump-action weapon designs. In some forms of delayed blowback, the rotating bolt is used as the delay mechanism: the bolt head rotates as the firing pin strikes, locking the chamber until the gas pressure reaches a safe level to extract.
Download as PDF; Printable version; In other projects Wikidata item; ... Help. Pages in category "Simple blowback firearms" The following 41 pages are in this ...