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The spring-powered claw extractor is also contained inside the bolt while the lever ejector is located inside the trigger housing (actuated by the recoiling bolt). Further like the G3 the HK33 also contains a spring extractor and a buffer. The ejector lever was installed in the trigger housing and is actuated by the recoiling bolt.
The lever essentially ratchets into place with friction, providing enough resistance to being re-opened that the bolt carrier does not rebound. The spring-powered claw extractor is also contained inside the bolt while the lever ejector is located inside the trigger housing (actuated by the recoiling bolt).
The standard HK93A2 utilized a fixed stock while the HK93A3 used a retractable stock. The HK93 series had a redesigned semi-automatic trigger pack and metal shelf installed in the trigger group well that made it impossible for it to fit a full-auto trigger pack. It also had the bayonet mount removed and had different furniture. [citation needed]
The spring-powered claw extractor is also contained inside the bolt while the lever ejector is located inside the trigger housing (actuated by the recoiling bolt). [ 7 ] The chamber has longitudinal gas relief flutes cut in the chamber wall to ease the cartridge case's extraction upon firing.
Per HK trigger group standards, most MP5 variants have the option of "SEF" or "Navy" trigger groups, with further alterations based on the availability and type of burst fire; the "SE" and "0-1" trigger groups are only available for semi-automatic and civilian variants. While the "SEF" trigger group's fire selector lever is located on the left ...
The CDA aka LEM trigger is a dual-stage trigger that always fires from a hammer down DA mode, but has an internal mechanism that is cocked with each cycle of the action. It provides a cocked double-action trigger pull of 20 N (4.5 lb f ) (+4/-2 N) and an uncocked double-action trigger pull of 51 N (11.5 lb f ) (±5 N).
This manual safety is available for most trigger variants. The variants with the optional external ambidextrous thumb safety have similar dimensions compared to the variants without this feature, but weigh approximately 50 g (1.8 oz) more and the safety levers add 3.66 mm (0.144 in) width resulting in an overall width of 38.46 mm (1.514 in).
The HK P9 is a semi-automatic pistol from Heckler & Koch in 9×19mm Parabellum, .45 ACP, and 7.65×21mm Parabellum and the first to use a variation of H&K's roller delayed blowback system in a pistol format and polygonal rifling [1] now common in H&K designs.