вільний затвор
unlocked breech mechanism
unlocked
breech
breech face
breech mechanism
breech ring (of firearm)
breech screw
breech-loading gun
lever breech mechanism (LBM)
breech loaded
breech piece socket
breech boresight
breech block pivoted below the level of the chamber
closed-breech scavenger system
blow-back breech block
breech and barrel assy
breech assembly
breech blast
breech block
breech carrier plate
breech casing
breech casing (of quick-firing ordnance)
breech chamber
breech cleaning brush
breech detail
breech end
breech end of barrel
breech end of bore
breech loader
breech loading (of ordnance)
breech lock
breech mechanism lever