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2. Bolt (firearms) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(firearms)

   The most common locking mechanism on rifles is a rotating bolt, which can be classified as a rigid type of bolt lock. Semi-rigid bolt locks have their locking elements movably mounted on either the bolt, barrel or breech housing and using a bolt carrier. Examples of semi-rigid bolt locks are roller-locked bolts, or ball bearings as on Heym SR ...

3. Pistol slide - Wikipedia

   en.wikipedia.org/wiki/Pistol_Slide

   Pistol slide. A SIG Sauer P226 with slide closed (top) and opened (bottom). On the bottom view, slide is locked to the rear by the slide stop. The slide on the majority of fully / semi-automatic pistols is the upper part that reciprocates ("slides") with recoil during the gun's operating cycle. It serves as the bolt carrier group (BCG) and ...

4. Tilting bolt - Wikipedia

   en.wikipedia.org/wiki/Tilting_bolt

   Tilting bolt. The bolt drops down into receiver recess and locks on bolt closing. Tilting bolt action is a type of locking mechanism often used in self-loading firearms and, rarely, in straight-pull repeating rifles. Essentially, the design consists of a moving bolt driven by some mechanism, most often a piston with gas pressure from the gas ...

5. Safety (firearms) - Wikipedia

   en.wikipedia.org/wiki/Safety_(firearms)

   Safety (firearms) Close-up shot of a safety of an M16A2 rifle. In firearms, a safety or safety catch is a mechanism used to help prevent the accidental discharge of a firearm, helping to ensure safer handling. Safeties can generally be divided into subtypes such as internal safeties (which typically do not receive input from the user) and ...

6. Recoil operation - Wikipedia

   en.wikipedia.org/wiki/Recoil_operation

   The bolt body unlocks and retracts the bolt head, extracts and ejects the cartridge, cocks the hammer, and compresses the return spring. Once the bolt reaches the end of its travel, the return spring provides the force to chamber the next round from the magazine, and lock the bolt closed. Cycle diagram explanation. Ready to fire position.

7. Firearm malfunction - Wikipedia

   en.wikipedia.org/wiki/Firearm_malfunction

   A slamfire is a premature, unintended discharge of a firearm that occurs as a round is being loaded into the chamber, when the bolt "slams" forward (hence the name), as a result of the firing pin having not been retracted into the bolt, or from the firing pin being carried forward by the momentum of returning to battery. Similar to a hammer ...