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  2. Push feed and controlled feed - Wikipedia

    en.wikipedia.org/wiki/Push_feed_and_controlled_feed

    Most push feed mechanisms use a spring loaded plunger type of ejector situated at the breech face, and this system ejects the spent casing as soon as the case mouth clears the ejection port. [9] Most controlled feed mechanisms use a fixed mechanical ejector attached to the receiver, which results in the bolt having to be pulled all or almost ...

  3. Extractor (firearms) - Wikipedia

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

    An extractor also performs the function of an ejector in revolvers. When the striking force applied to the ejector rod is hard and fast enough, the extractor will typically eject the empty case(s) from the cylinder. Some break-action shotguns are also designed to eject empty shells completely out of the chamber when the barrel is opened.

  4. 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.

  5. Gas-operated reloading - Wikipedia

    en.wikipedia.org/wiki/Gas-operated_reloading

    Direct impingement operation increases the amount of heat that is deposited in the receiver while firing, which can burn off and cover up lubricants. The bolt, extractor, ejector, pins, and springs are also heated by the same high-temperature gas. These combined factors reduce service life of these parts, reliability, and mean time between ...

  6. Glossary of firearms terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firearms_terms

    The extractor and firing pin are often integral parts of the bolt. Bore rope: A tool used to clean the barrel of a gun. Boresight: Crude adjustments made to an optical firearm sight, or iron sights, to align the firearm barrel and sights. This method is usually used to pre-align the sights, which makes zeroing (zero drop at XX distance) much ...

  7. Kel-Tec RDB - Wikipedia

    en.wikipedia.org/wiki/Kel-Tec_RDB

    The Kel-Tec RDB (Rifle, Downward-ejection, Bullpup) is a bullpup carbine offered in 5.56×45mm NATO semi-automatic rifle, manufactured by Kel-Tec Industries of Florida.It uses a rotary bolt with a spring loaded ejector and an extractor facing down, ejecting spent shell casings downward, allowing easy ambidextrous use.

  8. She Lived with These Parkinson’s Symptoms for Over a ... - AOL

    www.aol.com/she-lived-parkinson-symptoms-over...

    Veronica Brown lived with chronic fatigue, depression, and anxiety for over 10 years before she learned they were early signs of Parkinson's disease. Here's how she found relief after diagnosis.

  9. Forensic firearm examination - Wikipedia

    en.wikipedia.org/wiki/Forensic_firearm_examination

    The examination of the cartridge relies on the unique tool marks left by the various parts of the weapon including the firing pin and the ejector in semi and fully automatic firearms. These markings can be compared and matched to known exemplars fired from the same weapon using the same parts.