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  2. Robinson Armament XCR - Wikipedia

    en.wikipedia.org/wiki/Robinson_Armament_XCR

    In August 2009 Robinson Arms began shipping 3 different sized upper receivers enabling PDW and pistol style variants: [11] Standard Upper Receiver – The original length and designed to support barrel lengths from 11" to 18.6". Mini Upper Receivers – 15.25" long and designed to support barrel lengths from 9" to 18.6". Primarily intended for ...

  3. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    Uses 10mm magnum pistol cases with a 6.8 SPC bolt-face. The existing 357-Sig pistol is a 9mm bullet shouldered into the larger 40 S&W pistol case. The 10mm cartridge and the 40 S&W are almost identical, but the 10mm case is longer and operates at a higher pressure.

  4. List of 3D-printed weapons and parts - Wikipedia

    en.wikipedia.org/wiki/List_of_3D-printed_weapons...

    It fits under the rail of a Samson or similar rail system on the AR-15-type rifle, but can to perform acceptably on bolt action 7.62×51mm/.308 rifles as well), 762-AR10 Suppressor (designed for the AR-10/LAR-8 7.62mm/.308 rifle but will also work with any bolt-action rifle in .30 caliber or less) and 762-G3 Suppressor (designed for the Heckler ...

  5. Barrel threads - Wikipedia

    en.wikipedia.org/wiki/Barrel_threads

    Remington 1867 Navy pistol Sq21.59: 2.117 mm 90° Square threads. Also written as 0.850"-12. ... Mossberg MVP .308, Mossberg 100ATR, Mossberg ATR Night Train ...

  6. .22 CHeetah - Wikipedia

    en.wikipedia.org/wiki/.22_Cheetah

    The .22 CHeetah (both C and H are upper-case, [1] referring to Carmichel / Huntington [2]) is a .22 wildcat cartridge developed in the 1970s or 1980s by Jim Carmichel and Fred Huntington. [3] The .22 CHeetah is essentially a Remington.308 BR (empty .308 Winchester cases [4] [5]), modified to fit the .22 caliber. [6]

  7. Bushmaster Firearms International - Wikipedia

    en.wikipedia.org/wiki/Bushmaster_Firearms...

    Bushmaster Firearms originally produced their 'First Generation' rifle using an aluminum lower receiver and a stamped steel upper receiver. This first-generation model used a long-stroke gas piston operating system. The recoil spring was within the upper barrel gas system compared to the AR-15/M-16, where the recoil spring is within the butt stock.

  8. .308×1.5-inch Barnes - Wikipedia

    en.wikipedia.org/wiki/.308×1.5-inch_Barnes

    The .308×1.5" was one of the original short fat cartridge designs, having a length to width ratio of 3.17. The short fat cartridge design is considered to promote efficiency and shot to shot consistency. The .308×1.5" Barnes cartridge is comparable to cartridges such as the 7.62×39mm and the .30-30 Winchester. The .308×1.5" is capable of ...

  9. SIG MPX - Wikipedia

    en.wikipedia.org/wiki/SIG_MPX

    A semi-automatic only pistol variant with a SIG SBX pistol stabilizing brace and an 203 mm (8.0 inch) barrel. In the US in 2015 the BATFE warned users of weapons using SIG stabilizing braces that shouldering a weapon fitted with a brace constituted the making of a Title II NFA weapon, reversing a prior ruling that it did not. [11]