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  2. M231 Firing Port Weapon - Wikipedia

    en.wikipedia.org/wiki/M231_Firing_Port_Weapon

    Colt was given the contract and continued to work on the design. In 1979 the finalized weapon was adopted as the M231. Although most of the Bradley AFV's ports have since been removed, these weapons are maintained, and are used by crews for self-defense, close-quarters situations, and for firing from the rear door firing ports as intended.

  3. Firearm maintenance - Wikipedia

    en.wikipedia.org/wiki/Firearm_maintenance

    Front cover – The M16A1 Rifle – Operation and Preventive Maintenance by Will Eisner, issued to American soldiers in the Vietnam War. An inadequately maintained firearm will often accumulate excessive fouling and dirt within the barrel and receiver, which not only can clog up the rifling and decrease the firearm's accuracy and precision, but can also interfere with the proper operation of ...

  4. Knight's Armament Company Masterkey - Wikipedia

    en.wikipedia.org/wiki/Knight's_Armament_Company...

    The Masterkey is a door breaching shotgun system manufactured by Knight's Armament Company. The Masterkey project was initiated during the 1980s to provide assault rifles with a potent built-in door breaching tool. Individual soldiers were often forced to carry a breaching shotgun in addition to their standard-issue rifle, but the Masterkey ...

  5. Colt ACR - Wikipedia

    en.wikipedia.org/wiki/Colt_ACR

    The key design change was the use of "duplex rounds", a single cartridge with two bullets in it.Olin Corporation produced three different rounds for testing, the first consisting of two tungsten projectiles in a long-necked case, the second used a standard-length case with two 1.7 grams (27 gr), 4.0-millimetre (0.158 in) tungsten projectiles, and the final entry was another standard-length ...

  6. .320 Revolver - Wikipedia

    en.wikipedia.org/wiki/.320_Revolver

    Due to the popularity of the .32 Long Colt and, later, the more accurate .32 Smith & Wesson Long, the older .32-caliber cartridges, such as the .320 and the .32 Rimfire, declined in popularity and were eventually more or less obsolete by the 1920s. In Brazil, both .320 guns and ammo (double-barreled, side-by-side pistols) were made up to the 1960s.

  7. Teflon-coated bullet - Wikipedia

    en.wikipedia.org/wiki/Teflon-coated_bullet

    Kansas state laws states possessing, manufacturing, causing to be manufactured, selling, offering for sale, lending, purchasing or giving away any cartridge which can be fired by a handgun and which has a plastic-coated bullet that has a core of less than 60% lead by weight, whether the person knows or has reason to know that the plastic-coated ...

  8. Half-cock - Wikipedia

    en.wikipedia.org/wiki/Half-cock

    Colt Single Action Army hammer at half cock. Half-cock is when the position of the hammer of a firearm is partially—but not completely—cocked. Many firearms, particularly older firearms, had a notch cut into the hammer allowing half-cock, as this position would neither allow the gun to fire nor permit the hammer-mounted firing pin to rest on a live percussion cap or cartridge.

  9. Colt CM901 - Wikipedia

    en.wikipedia.org/wiki/Colt_CM901

    The system's heart is a common lower receiver housing an enlarged magazine well that will accommodate 5.56×45mm rounds using a STANAG magazine or larger caliber ammunition than NATO 5.56×45mm rounds using either a proprietary magazine or an SR-25 pattern magazine, [2] ambidextrous controls for the bolt release mechanism, magazine release, and ...