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A firing pin or striker is a part of the firing mechanism of a firearm that impacts the primer in the base of a cartridge and causes it to fire. In firearms terminology, a striker is a particular type of firing pin where a compressed spring acts directly on the firing pin to provide the impact force rather than it being struck by a hammer.
The lock time can be measured electronically, but is often instead calculated mathematically by the manufacturer. [citation needed] Important mathematical design parameters taken into consideration is the spring constant (stiffness), firing pin weight as well as the weight of any other moving parts and length of movement.
Spring-loaded firing pins may move further forward than expected during the loading process if the restraining spring is broken or weakened by age. As rust, dirt, fouling, or inappropriately viscous lubricants accumulate in the firing pin channel, both free-floating and spring-loaded firing pins may be held in a forward position protruding from ...
The AK-47 was designed to be a simple, reliable fully automatic rifle that could be manufactured quickly and cheaply, using mass production methods that were state of the art in the Soviet Union during the late 1940s. [41] The AK-47 uses a long-stroke gas system generally associated with high reliability in adverse conditions.
It is extremely faithful to the Type 3 design, even having a milled receiver and original AK-47 style bayonet lug, but does retain some manufacturing differences from the Type 56 such as the pinned in barrel, lack of vent cuts on the gas tube heat guard, only 3 rivets on the trigger guard, the stamped recoil guide rod, spring loaded firing pin ...
Compared to a closed-bolt design, open-bolt weapons generally have fewer moving parts. The firing pin is often part of the bolt, saving on manufacturing costs; the inertia of the bolt closing also causes the fixed firing pin to strike a blow on the primer, without need for a separate hammer/striker and spring.
Early steel AK-47 magazines are 9.75 in (248 mm) long, and the later ribbed steel AKM and newer plastic 7.62×39mm magazines are about 1 in (25 mm) shorter. [ 16 ] [ 17 ] The transition from steel to mainly plastic magazines yielded a significant weight reduction and allow a soldier to carry more rounds for the same weight.
The Karabinek-granatnik wzór 1960 (Polish: Carbine-grenade launcher model 1960), also designated PMK-DGN-60 [1] or PMK-60, [2] is a Polish-made version of the AK-47 assault rifle that can fire rifle grenades.