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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.
Blowback firearms sometimes lack an extractor as they really aren't necessary for this method of operation. Delayed blowback This action is found where recoil is light enough that a fully locked breech is not necessary. Like simple blowback, it is case movement that opens the breech. This is a more robust version of simple blowback.
According to Newtonian mechanics, if the gun and shooter are at rest initially, the force on the bullet will be equal to that on the gun-shooter. This is due to Newton's third law of motion (For every action, there is an equal and opposite reaction). Consider a system where the gun and shooter have a combined mass m g and the bullet has a mass m b.
The Oerlikon SSG36 anti-tank rifle demonstrated, that it was possible to build a successful straight blowback rifle up to 20 mm caliber shooting at 750 m/s (2,500 ft/s) velocity. The SSG36 used a Becker principle of bolt head following the rebated rim cartridge base deep into the chamber. After firing, the case and the bolt could safely back ...
An American woman will spend a year behind bars in Australia after she attempted to bring a gold-plated gun into the country. On Monday, Liliana Goodson, 30, pleaded guilty to charges of illegally ...
Three congressmen wrote in a letter to the ATF that they have "grave concerns" that some law enforcement officers are "exploiting their positions to acquire and illegally distribute firearms."
The Winchester Model 1903 [14] and Winchester Model 1905 [15] operated on the principle of blowback to function semi-automatically. Designed by T.C. Johnson , the Model 1903 achieved commercial success and continued to be manufactured until 1932, when the Winchester Model 63 replaced it.