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.
References in periodicals archive ?
With the bolt locking into the barrel extension, is there another reason for your alteration providing some additional rifle accuracy through eliminating bolt carrier tilt?
Swab-its has released new STAR CHAMBER CLEANING FOAM SWABS, specifically designed for cleaning the unique contours of a star chamber, or barrel extension, of AR-15/M4-style MSRs.
As it hits home, the hull is ejected by a hook on the back end of the barrel extension.
The steel bolt locks into a cutout in the barrel extension, and the dual carrier arms drop down to pick up a fresh shell after the empty hull is extracted and thrown downward from the gun.
The material for the bolt and barrel extension meets and exceeds the Edge's Mil-Spec counterparts.
It was missing the barrel extension (that incorporates the locking lugs), the front sight/gas block, and flash suppressor.
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.
99 This elite dart blaster has a MEGA dart barrel extension as well as a mighty missile launcher.
Tenders are invited for Supply of Steel flat 50mm x 38mm 68mm long of barrel extension for rifle 5.
I know some builders who have experimented with lapping in the lugs with the barrel extension, with no improvement in accuracy.
Rajput had broken his gun's barrel extension on the eve of the qualifiers and had been struggling since then to get it fixed.