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2. Kalthoff repeater - Wikipedia

   en.wikipedia.org/wiki/Kalthoff_repeater

   The Kalthoff repeater was a type of repeating firearm that was designed by members of the Kalthoff family around 1630, [1] and became the first repeating firearm to be brought into military service. [2] At least nineteen gunsmiths are known to have made weapons following the Kalthoff design. [2] Some early Kalthoff guns were wheellocks, [3][4 ...

3. Safety (firearms) - Wikipedia

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

   Safety (firearms) 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 external safeties (which typically allow the user ...

4. 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 ...

5. 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being loaded into the chamber, when the bolt "slams" forward (hence the name), as a result of the firing pin having not been retracted into the bolt, or from the firing pin being carried forward by the momentum of returning to battery.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 ...

6. Blowback (firearms) - Wikipedia

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

   As the bolt head is driven rearward, rollers on the sides of the bolt are driven inward against a tapered bolt carrier extension. This forces the bolt carrier rearward at a much greater velocity and delays movement of the bolt head. The primary advantage of roller-delayed blowback is the simplicity of the design compared to gas or recoil operation.

7. Slide stop - Wikipedia

   en.wikipedia.org/wiki/Slide_stop

   Slide stop. A P226 with breech closed (top) and opened (bottom). On the bottom view, the slide is locked in place by the slide stop. A slide stop, sometimes referred to as a slide lock or slide release, is a function on a semi-automatic handgun that both visually indicates when it has expended all loaded ammunition and facilitates faster ...