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  2. Mk 12 Special Purpose Rifle - Wikipedia

    en.wikipedia.org/wiki/Mk_12_Special_Purpose_Rifle

    The Mk 12 Mod H was used primarily by Army SOF and SMUs, and featured a retrofit upper of the Mod 0 with PRI Gen3 round hanguards and a shorter RECCE rail to replace the original Swan Sleeve, reducing weight, and either Douglas or Noveske barrels made with the SPR profile in a rifle length gas system. [9] The Mk 12 was phased out of service in ...

  3. Winchester Model 70 - Wikipedia

    en.wikipedia.org/wiki/Winchester_Model_70

    The reconditioned rifles were used in competitive shooting matches; and the United States Army purchased approximately 200 new Model 70 National Match Rifles with medium heavy barrels for match use between 1954 and 1957. Many of the reconditioned Marine Corps match rifles were used by Marine Corps snipers during the early years of the Vietnam ...

  4. Harrington & Richardson - Wikipedia

    en.wikipedia.org/wiki/Harrington_&_Richardson

    H&R 330: Made from 1968 to 1972, this model is an FN Mauser action that Harrington and Richardson bought as surplus and produced into sporterized hunting rifles using Douglas barrels and conventional stocks, chambered in 7mm Remington Magnum. [23] H&R M12 5200: A competitor to the Winchester Model 52 series rifle. Bolt action .22 LR single-shot ...

  5. Mk 153 Shoulder-Launched Multipurpose Assault Weapon

    en.wikipedia.org/wiki/Mk_153_Shoulder-Launched...

    The spotting rifle is mounted on the right side of the launch tube. It functions semi-automatically by primer actuation, meaning that when fired the primer sets back and unlocks the breech of the spotting rifle, ejecting the spent round. The firing mechanism mechanically fires the spotting rifle and uses a magnet to fire the rocket.

  6. List of multiple-barrel firearms - Wikipedia

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

    Feldl gun 11x50mmR Bavaria: 1867 Fokker-Leimberger: A.H.G. Fokker & Leimberger: 7.92×57mm Mauser Germany: 1916 Fyodorov–Shpagin Model 1922: 6.5×50mmSR Arisaka Soviet Union: 1922 Gardner gun United States: 1874 Gast gun: 7.92×57mm Mauser Germany: 1915 Gatling gun United States: 1861 GAU-8 Avenger: General Electric: 30×173mm United States ...

  7. USFA ZiP .22 - Wikipedia

    en.wikipedia.org/wiki/USFA_ZiP_.22

    The Zip .22 (stylized as ZiP) is a semi-automatic pistol chambered in .22 Long Rifle, commercially introduced by the U.S. Fire Arms Manufacturing Company (USFA) in 2013. . Although given some praise for its innovative concept, affordability and accuracy, it was widely panned for its frequent mechanical malfunctions, with failures to feed ammunition and eject spent casings being reported by a ...

  8. Gun barrel - Wikipedia

    en.wikipedia.org/wiki/Gun_barrel

    A gun barrel is a crucial part of gun-type weapons such as small firearms, artillery pieces, and air guns. It is the straight shooting tube, usually made of rigid high-strength metal , through which a contained rapid expansion of high-pressure gas(es) is used to propel a projectile out of the front end ( muzzle ) at a high velocity.

  9. 6.5×68mm - Wikipedia

    en.wikipedia.org/wiki/6.5×68mm

    To make the 6.5×68mm an awesome long-range cartridge, rifle barrels with a 200 mm to 230 mm (1 in 7.9 to 9 inch) twist rate are a better choice. Due to the large case capacity in relation to the 6.5 mm (.264 inch) caliber bore size the 6.5×68mm is very harsh on barrels. The 6.5×68mm typically wears out a rifle barrel in 500 to 1000 rounds.