[NEWS] Gas Blow-Back Rifles

[ziofester]

il pulsante vicino al grilletto è il "bolt catch button", lo si può utilizzare per bloccare l'otturatore, ma anche sbloccare l'otturatore quando si cambia il caricatore esausto

Operating mechanism

The G36 is a gas operated weapon that uses burnt powder gases from the barrel, bled through a vent near the muzzle which transmits the gas thrust to the bolt carrier, providing automation to the moving assembly; it fires from a closed bolt position. The weapon uses a self-regulating spring-buffered short-stroke gas piston system (the rifle has no gas valve). The rotary bolt features 7 radial locking lugs and its rotation is controlled by a cam pin guided inside a camming guide cut-out in the bolt carrier. The bolt also houses a spring-loaded casing extractor and an ejector.
The bolt is automatically locked to the rear when the last round is expended, but the bolt catch can be deactivated. The bolt catch button is located at the forward end of the trigger guard. The spring-loaded folding cocking handle extends forward in line with the barrel of the rifle (it is located on top of the receiver, under the carry handle). It can be swung to either side of the receiver, depending on whether the user is right or left-handed and is locked when pressed inward. When locked at a perpendicular angle to the receiver, the handle can be used as a forward assist to force the bolt into battery, or to extract a stuck cartridge casing (the cocking handle's design is protected in the US by patent number 5821445, by Manfred Guhring).
Spent cartridge casings are ejected through a port located on the right side of the receiver. A brass deflector keeps cases from striking left-handed operators in the face. There is no ejection port cover as the bolt closes the ejection port to particulates when it is forward. The weapon features a hammer-type striking mechanism.