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2. Extractor (firearms) - Wikipedia

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

   A flip-up barrel and lack of extractor on a Beretta Bobcat semi-automatic pistol. Some very early blowback pistols used ammunition with no rim or extractor groove on the cartridge cases (e.g., 5mm Bergmann), and such pistols, therefore, lacked extractors. The spent case was forced out of the chamber by recoil and was subsequently ejected.

3. Headspace (firearms) - Wikipedia

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

   Headspace positioning of rimless, rimmed, belted and straight cartridges Several different rimmed, .22 rimfire cartridges, which have a uniform forward diameter, and which have headspace on the rim, allowing any length of cartridge shorter than the maximum size to be used in the same firearm Firearms chambered for tapered rimmed cartridges like this .303 British cannot safely fire shorter ...

4. Screw extractor - Wikipedia

   en.wikipedia.org/wiki/Screw_extractor

   Straight fluted extractors may come in a kit that also has associated drills, drill bushings, and special nuts, or be sold individually. The screw is drilled out with the appropriate drill and drill bushing. The extractor is then hammered into the hole with a brass hammer, because a steel hammer is more likely to cause the extractor to break.

5. Blowback (firearms) - Wikipedia

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

   In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. [3]

6. Primary extraction - Wikipedia

   en.wikipedia.org/wiki/Primary_extraction

   The case is not chemically sticking as it still rotates with the bolt, gripped by the extractor claw on the rim. The mechanical sticking effect is a result from the case having expanded due to the high pressures during firing, and the extra initial force required can, depending on firearm design, make the extraction difficult for the user.

7. Caseless ammunition - Wikipedia

   en.wikipedia.org/wiki/Caseless_ammunition

   Caseless ammunition is an attempt to reduce the weight and cost of ammunition by dispensing with the case, which is typically precision made of brass or steel, as well as to simplify the operation of repeating guns by eliminating the need to extract and eject the empty case after firing. [2]

8. Ruger Security-9 - Wikipedia

   en.wikipedia.org/wiki/Ruger_Security-9

   Introduced in late 2017, Ruger intended to use the Security-9 to replace the Ruger SR-Series.The Security-9 managed to be even less expensive than the SR-Series as it eliminated the adjustable backstrap and ambidextrous magazine release, used an internal hammer-fired mechanism instead of a striker-fired mechanism and hardened aluminum alloy rails instead of steel rails.

9. Browning Hi-Power - Wikipedia

   en.wikipedia.org/wiki/Browning_Hi-Power

   A wide variety of options and features are available on the P35 models. Recently, Hi-Power pistols have become available in .40 S&W and .357 SIG loadings. The use of these calibres in guns designed and built for 9×19mm Parabellum has created cases of broken or warped frames. Only Hi-Powers specifically built for these rounds should be used to ...