gun breech

gun breech

[′gən ‚brēch]
(ordnance)
The mass of metal at the rear end of a cannon, from the front slope to the rear face, exclusive of the breech mechanism; in this metal are formed the seat for the breech mechanism, the powder chamber, and the slopes connecting the latter with the rifled portion of the bore.
References in periodicals archive ?
Install the MILES tank firing insulator card between the firing contacts on the right side of the main gun breech ring assembly.
It was during the two years in F building that I had on the job training and remember hardness testing sten gun breech blocks and testing PIAT gun springs by lifting 30lb weights on and off, one at a time.
When the internal propellant is stimulated accidentally outside of a gun breech, the base is then separated by the expanding internal pressure of the propellant.
But a chain gun uses an electric motor to draw the belt of ammunition through the gun breech.