barrel extension

barrel extension

[′bar·əl ik′sten·shən]
(ordnance)
Metal projection fixed to the rear of the barrel in certain automatic guns; extends backward and holds the breech locked against the gas pressure in the chamber when the gun is fired.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
With the Delta 5, the barrel is attached via a barrel extension, much like an AR.
cartridge into a ,223-diameter barrel extension is much harder than it sounds.
The operating system of the AR70 bears some similarities to the AK47 in that the barrel extension employs two locking lugs for the rotating bolt similar to the Kalashnikov design.
Squaring AR receiver front ends is a separate topic entirely from removing the slop between the fit of the barrel extension and the receiver.
In traditional design, the latch for opening the barrel unit was T-shaped and pivoted on the barrel extension. The one on the original Ranger was slightly different, but worked the same way, engaging posts on the frame.
The 20-inch, l:12-inch twist, heavy-profile barrel and barrel extension, and extended, monolithic receiver add additional rigidity to reduce fluctuation between shots while the extended receiver provides rail space for optics.
As it hits home, the hull is ejected by a hook on the back end of the barrel extension. If there's a shell in the magazine it is simultaneously released, tripping the bolt release and the carrier elevates a fresh round into the breech.
An Elite Dart blaster, the MEGA Dart Barrel Extension, and a mighty Missile Launcher Stock 6.
The 870 pump receiver has been proven to be solid despite user abuse and neglect, but the short barrel extension led to a crack in the 58's receiver.
NERF MODULUS TRI-STRIKE BY HASBRO, PS59.99 This elite dart blaster has a MEGA dart barrel extension as well as a mighty missile launcher.