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  2. Flapper locking - Wikipedia

    en.wikipedia.org/wiki/Flapper_locking

    As the bolt is forced backwards after the firing of a cartridge, the flappers recede back into the bolt, therefore unlocking and sending the bolt backwards to cycle the gun. The design was patented in 1870 by Lieutenant Friberg of the Swedish Army, but the first actual example of a firearm that used this was made by another Swedish man named ...

  3. Springfield Model 1866 - Wikipedia

    en.wikipedia.org/wiki/Springfield_Model_1866

    Springfield Model 1866 breech. The Springfield Model 1866 was the second iteration of the Allin-designed trapdoor breech-loading mechanism. Originally developed as a means of converting rifle muskets to breechloaders, the Allin modification ultimately became the basis for the definitive Springfield Model 1873, the first breech-loading rifle adopted by the United States War Department for ...

  4. Door breaching - Wikipedia

    en.wikipedia.org/wiki/Door_breaching

    Door breaching is a process used by military, police, or emergency services to force open closed or locked doors. A wide range of methods are available depending on the door's opening direction (inward or outward), construction materials, etc., and one or more of these methods may be used in any given situation.

  5. Canon de 138 mm Modèle 1929 - Wikipedia

    en.wikipedia.org/wiki/Canon_de_138_mm_Modèle_1929

    Twin-mounted Mle 1934 guns seen on Mogador, 1940 The Mle 1934 gun was installed in twin-gun, electrically powered Modèle 1934 base-ring "pseudo-turrets" that weighed 34.6 tonnes (34.1 long tons; 38.1 short tons) that were fitted with a 10 millimetres (0.39 in) thick, open-backed gunhouse.

  6. List of multiple-barrel firearms - Wikipedia

    en.wikipedia.org/wiki/List_of_multiple-barrel...

    Nikonov machine gun: Izhmash: 5.45×39mm Soviet Union: 1977 Nordenfelt gun United Kingdom: 1873 Rheinmetall MG14Z: Tactics Group GmbH: 7.62×51mm NATO Germany: 2014 Rheinmetall RMG 7.62: Rheinmetall Defence: 7.62×51mm NATO Germany: 2013 Twin Bren: 7.62×39mm China: 1935 Type 89 machine gun: 7.7×58mm Arisaka Japan: 1929 Type 100 machine gun: 7 ...

  7. 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 ...

  8. Multiple-barrel firearm - Wikipedia

    en.wikipedia.org/wiki/Multiple-barrel_firearm

    Remington Model 95 with pearl grips and barrels open for reloading COP .357 Magnum derringer. The original Philadelphia Deringer was a small single-barrel, muzzleloading caplock pistol designed by Henry Deringer (1786–1868) and produced from 1852 to 1868, and was a popular concealed carry single-shot handgun of the era widely copycatted by competitors. [6]

  9. Breaching round - Wikipedia

    en.wikipedia.org/wiki/Breaching_round

    A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.