| 摘要 |
A bolt locking housing ( 16 ) on a gun, behind the chamber ( 4 ) thereof, for receiving a bolt ( 6 ) including an extractor ( 10 ) having an extractor hook that grips a corresponding extractor groove ( 21 ) of a cartridge ( 2 ) within said chamber ( 4 ), characterized by said bolt locking housing ( 16 ) being asymmetrically machined internally, such that there is provided at least a first protrusion ( 18 ) that becomes co-aligned with and serves to support head of extractor ( 10 ), when bolt ( 6 ) is fully closed and lugs ( 7 ) thereon are interlocked into bolt locking housing ( 16 ), thereby preventing deformation of casing of said cartridge ( 2 ) after detonation. |
