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  2. Caliber conversion device - Wikipedia

    en.wikipedia.org/wiki/Caliber_conversion_device

    A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows ...

  3. Caliber change - Wikipedia

    en.wikipedia.org/wiki/Caliber_change

    The term caliber change in firearms refers to the process of permanently altering a firearm to allow it to fire a different cartridge than the one it previously fired. With a bolt action rifle, this is mostly done by reshaping the current chamber through machining it with a new reamer, or by replacing the barrel with a new barrel, which has a new cartridge chamber machined into it.

  4. Gauge (firearms) - Wikipedia

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

    The gauge (in American English or more commonly referred to as bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) and other necessary parameter to define in general a smoothbore barrel (in difference of caliber what define a barrel with rifling and there cartridge).

  5. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [1]

  6. Firearm modification - Wikipedia

    en.wikipedia.org/wiki/Firearm_modification

    Conversion from fully automatic or select fire to semiautomatic only or manual operation, or vice versa; Short recoil to blowback conversions, used in various .22 Long Rifle conversions, such as the Colt Ace and J. A. Ceiner conversion kits. [2] Conversion from handgun to carbine or rifle [3]

  7. Gun conversion devices that turn pistols into automatic ...

    www.aol.com/news/gun-conversion-devices-turn...

    A new device, easily purchased online, that can turn a semi-automatic pistol into a fully automatic weapon is drawing serious concern from law enforcement officials.

  8. Yes, ‘Glock Switches’ Can Turn a Firearm Into an ... - AOL

    www.aol.com/news/glock-switches-turn-firearm...

    The bill defines a machine gun conversion device as any device that is designed or intended to convert a semiautomatic firearm into a weapon that can fire more than a single shot automatically by ...

  9. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...