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  2. 14-inch/45-caliber gun - Wikipedia

    en.wikipedia.org/wiki/14-inch/45-caliber_gun

    The 14-inch/45-caliber gun, (spoken "fourteen-inch-forty-five-caliber" [citation needed]), whose variations were known initially as the Mark 1, 2, 3, and 5, and, when upgraded in the 1930s, were redesignated as the Mark 8, 9, 10, and 12. They were the first 14-inch (356 mm) guns to be employed by the United States Navy.

  3. 14-inch/50-caliber gun - Wikipedia

    en.wikipedia.org/wiki/14-inch/50-caliber_gun

    The 14-inch (356mm), 50 caliber [2] gun was the weapon chosen as the main armament on the Lexington-class battlecruiser when they were originally designed, but it was later switched to the 16"/50 caliber Mark 2 gun in a 1917 redesign. The ships were eventually canceled in 1922 after the Washington Naval Treaty was signed. [3]

  4. 14.5 × 114 mm - Wikipedia

    en.wikipedia.org/wiki/14.5_×_114_mm

    The 14.5×114mm (.57 calibre) is a heavy machine gun and anti-materiel rifle cartridge used by the Soviet Union, the former Warsaw Pact, modern Russia, and other countries.. It was originally developed for the PTRS and PTRD anti-tank rifles, and was later used as the basis for the KPV heavy machine gun that formed the basis of the ZPU series anti-aircraft guns that is also the main armament of ...

  5. Adaptive Combat Rifle - Wikipedia

    en.wikipedia.org/wiki/Adaptive_Combat_Rifle

    The rifle is available with four barrel lengths and can be easily converted from a standard rifle (with a 16.5 inch barrel) into a carbine (with a 14.5 inch barrel), into a compact rifle (with a 10.5 inch barrel), or into a designated marksman rifle (with an 18-inch barrel) without any tools. Barrel lengths of the two calibres are exactly the same.

  6. Close Quarters Battle Receiver - Wikipedia

    en.wikipedia.org/wiki/Close_Quarters_Battle_Receiver

    The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.

  7. Gauge (firearms) - Wikipedia

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

    An n-gauge diameter means that a ball of lead (density 11.34 g/cm 3 or 0.4097 lb/in 3) with that diameter has a mass equal to ⁠ 1 / n ⁠ part of the mass of the international avoirdupois pound (approx. 454 grams), that is, that n such lead balls could be cast from a pound weight of lead.

  8. Mk 12 Special Purpose Rifle - Wikipedia

    en.wikipedia.org/wiki/Mk_12_Special_Purpose_Rifle

    An 18-inch (457 mm) (MOD 0/1) or 16-inch (406 mm) (MOD H) threaded-muzzle match-grade free floating stainless steel heavy barrel with a 1:7 (178 mm) rifling twist ratio is standard for the SPR. [11] [3] [13] The barrels are manufactured by Douglas Barrels with a unique contour that reduced weight but maintained rigidity for accuracy. [14]

  9. BL 14-inch Mk VII naval gun - Wikipedia

    en.wikipedia.org/wiki/BL_14-inch_Mk_VII_naval_gun

    The new 14-inch Armour Piercing (AP) 1,590-pound/ 721 kg shell had, relative to its size, superior ballistic performance and armour-penetration compared to previous British shells, due to improvements in design and material which had taken place since World War I. [6] The shell also carried a proportionally large bursting charge of 39.8 lb (18. ...

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