Gas traveling forward strikes the recoil booster and is reflected rearward to impinge against the barrel face and give further energy to the barrel's rearward momentum, and thus the bolt group as well.
Note that on the MG3/MG74 the blast cone (recoil booster) is integral with the flash hider.
Do not lubricate the recoil booster, as considerable carbon fouling builds up on this component, as well as the ruckstossduse and the muzzle end of the barrel.
It essentially acts as a recoil booster
. Certain pistol designs are more sensitive to extra mass than others, but all locked-breech pistols benefit from the boost a Nielsen Device provides.
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.
The Vickers has a cup-shaped recoil booster
threaded onto the muzzle.
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