20) What are boosters and Nielsen Devices?
10/22/2012 by
Firearms utilizing the Browning tilting barrel design, during the cycle of operation, require that the barrel tilt upwards at the muzzle. The shorter the barrel, the more exaggerated the angle of the tilt. Putting weight on the muzzle end of the pistol is like adding weight to the end of a seesaw. The chamber end of the barrel locks into the slide and the weight of the silencer cams pressure upwards. When the pistol is fired with weight at the muzzle end, these types of handguns (including 1911s, Glocks, Sigs, M&Ps, and most popular brands/designs on the market) have trouble unlocking. If they do manage to successfully unlock, they will have trouble lifting the weight of the silencer and cycling properly.
A Nielson type device, like the Advanced Armament A.S.A.P. (Assured Semi-Auto Performance) system, assists the pistol and allows for reliable function. The A.S.A.P. system consists of an action spring and a piston that is threaded to mate up with the host weapon’s muzzle threads.
As the projectile enters into the silencer, the expanding gasses behind it impact the baffles. As the baffles slow, redirect, and cool the gases, the pressure behind them force the silencer forward, like the wind hitting an umbrella you are carrying. This momentarily relieves the weight on the end of the barrel, giving the barrel enough time to unlock and cycle reliability, before the action spring snaps the silencer back into place, ready for the next shot.
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