recoil booster

recoil booster

[′rē‚kȯil ‚büs·tər]
(ordnance)
Component of a machine gun which traps some of the gas from the barrel and acts to ensure positive recoil action when the gun is fired at angles other than the usual horizontal.
References in periodicals archive ?
Unscrew the conical flash suppressor and remove the suppressor and recoil booster to the front.
A hinged, spring-loaded extension attached to the front sight assembly lies forward and holds the retaining notches at the rear end of the recoil booster cylinder, which is screwed into the rear of the flash suppressor.
The booster cone (diise) is inside the recoil booster cylinder.
Recoil-operated with a recoil booster, the barrel and lock mechanism recoil back approximately 17mm, securely locked together, until the barrel's rearward momentum ceases and a locking toggle breaks upward to allow the breechblock to continue its rearward travel alone.
It works in a satisfactory manner in the Maxim and Vickers belt-fed machine guns, which are chambered for rifle cartridges that generate a significant recoil impulse and furthermore have gas-assisted recoil booster glands.