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2. Action (firearms) - Wikipedia

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

   The term action can also include short, long, and magnum if it is in reference to the length of the rifle's receiver and the length of the bolt. The short action rifle usually can accommodate a cartridge length of 2.8 in (71 mm) or smaller. The long action rifle can accommodate a cartridge of 3.34 in (85 mm), and the magnum action rifle can ...

3. Torque wrench - Wikipedia

   en.wikipedia.org/wiki/Torque_wrench

   A click torque wrench. A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw.It is usually in the form of a socket wrench with an indicating scale, or an internal mechanism which will indicate (as by 'clicking', a specific movement of the tool handle in relation to the tool head) when a specified (adjustable) torque value has been reached ...

4. Gas-operated reloading - Wikipedia

   en.wikipedia.org/wiki/Gas-operated_reloading

   short-stroke gas piston Short stroke gas piston and bolt carrier group, from a gas piston AR-15. With a short-stroke or tappet system, the piston moves separately from the bolt group. It may directly push [12] the bolt group parts, as in the M1 carbine, or operate through a connecting rod or assembly, as in the Armalite AR-18 or the SKS.

5. Glossary of firearms terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_firearms_terms

   Bolt action: A type of firearm action in which the firearm's bolt is operated manually by the opening and closing of the breech with a small handle. As the handle is operated, the bolt is unlocked, the breech is opened, the spent shell casing is withdrawn and ejected, the firing pin is cocked, and a new round/shell (if available) is placed into ...

6. Recoil operation - Wikipedia

   en.wikipedia.org/wiki/Recoil_operation

   The short recoil action dominates the world of centerfire semi-automatic pistols, being found in nearly all weapons chambered for high-pressure pistol cartridges of 9×19mm Parabellum and larger, while low-pressure pistol cartridges of .380 ACP and smaller generally use the blowback method of operation. Short recoil operation differs from long ...

7. Bolt (firearms) - Wikipedia

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

   This bolt design is often used to reduce overall weapon length without sacrificing barrel length or bolt weight. A turn bolt refers to a firearm component where the whole bolt without using a bolt carrier turns to lock/unlock. This is mostly used to describe manually operated bolt action firearms, but also on some automatic firearms.

8. Short call vs. long call - AOL

   www.aol.com/finance/short-call-vs-long-call...

   Effect of time: The price of an option tends to decline over time, meaning the passage of time works in the favor of the short call and against the long call, all else equal. FAQs about short ...

9. Direct impingement - Wikipedia

   en.wikipedia.org/wiki/Direct_impingement

   Firearms with a direct impingement design can, in principle, be constructed lighter than piston-operated designs. Because high-pressure gas acts directly upon the bolt and carrier in a direct impingement system, it does not need a separate gas cylinder, piston, and operating rod assembly of a conventional piston-operated system, only requiring a gas tube to channel gas from the barrel back ...