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2. Firearm malfunction - Wikipedia

   en.wikipedia.org/wiki/Firearm_malfunction

   Rim lock is where the rim of the shell casing gets caught on the extractor groove of the casing underneath it. It is a common issue for calibers with large rims, such as 7.62×54mmR , or guns that have been rechambered for cartridges shorter than intended without replacing the original magazine with one that compensates for the shorter round.

3. Caliber conversion device - Wikipedia

   en.wikipedia.org/wiki/Caliber_conversion_device

   Since most cartridge cases are only about 5 cm (2.0 in) long, this provides a limited power advantage. On the other hand, these will function from magazines in the same way as supplemental chambers, and allow the use of inexpensive rimfire ammunition in firearms chambered in .22 caliber (5.56 mm) or smaller.

4. Cartridge (firearms) - Wikipedia

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

   The head of a brass case can be work-hardened to withstand the high pressures, and allow for manipulation via extraction and ejection without rupturing. The neck and body portion of a brass case is easily annealed to make the case ductile enough to allow reshaping so that it can be handloaded many times, and fire forming can help accurize the ...

5. Glossary of firearms terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_firearms_terms

   The case contains the priming compound, usually in its own removable assembly called a primer. The case will also contain the charge of smokeless gunpowder, or sometimes black powder, and will be topped off by the projectile. Anti-glare: A grooved/textured surface detail found above the barrel to deflect light from affecting target aqquisition.

6. 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]

7. Handgun holster - Wikipedia

   en.wikipedia.org/wiki/Handgun_holster

   An H&K P7 pistol in a holster. A handgun holster is a device used to hold or restrict the undesired movement of a handgun, most commonly in a location where it can be easily withdrawn for immediate use. Holsters are often attached to a belt or waistband, but they may be attached to other locations of the body (e.g., the ankle holster).