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  2. SR-25 - Wikipedia

    en.wikipedia.org/wiki/SR-25

    The SR-25 (Stoner Rifle-25) [1] is a designated marksman rifle and semi-automatic sniper rifle designed by Eugene Stoner and manufactured by Knight's Armament Company. [1] The SR-25 uses a rotating bolt and a direct impingement gas system. It is loosely based on Stoner's AR-10, rebuilt in its original 7.62×51mm NATO caliber.

  3. List of the United States Army weapons by supply catalog ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    Ordnance crest "WHAT'S IN A NAME" - military education about SNL. This is a historic (index) list of United States Army weapons and materiel, by their Standard Nomenclature List (SNL) group and individual designations — an alpha-numeric nomenclature system used in the United States Army Ordnance Corps Supply Catalogues used from about 1930 to about 1958.

  4. Receiver (firearms) - Wikipedia

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

    A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and at law, the firearm frame or receiver is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally attaching ("receiving ...

  5. ArmaLite AR-50 - Wikipedia

    en.wikipedia.org/wiki/Armalite_AR-50

    The AR-50 rifle utilizes its weight and a large, fluted muzzle brake to reduce recoil. The AR-50 weighs approximately 34 pounds and is a single-shot bolt-action rifle. The barrel is thick and rigid to prevent it from flexing. All AR-50 barrels use 1:15 right hand rifling.

  6. Barrel threads - Wikipedia

    en.wikipedia.org/wiki/Barrel_threads

    Typically, many rifles use thread diameters in the range between 25–27 mm (0.98–1.06 in). [citation needed] Many older rifles from the first half of the 20th century use a thread pitch around 2 mm (12.7 TPI), while many modern rifle use thread pitches around 1.5 mm (16.93 TPI). Fine threaded systems intended for hand tightening typically ...

  7. M231 Firing Port Weapon - Wikipedia

    en.wikipedia.org/wiki/M231_Firing_Port_Weapon

    A M231 FPW, with wire stock (Top-right of the image) The M231 is different in many ways from a standard M16. The original Rock Island Arsenal FPW fired from an open bolt, with an extremely high rate of firing (1,200 rpm). The Colt XM231 introduced a special buffer and spring assembly, with three springs nested one within the other.

  8. Bushmaster Firearms International - Wikipedia

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

    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. Originally marketed for police and the military, Bushmaster later moved from this design to a variant of Eugene Stoner's AR-15/M-16 weapon system. Bushmaster chambered the First Generation rifles for the 5.56mm ...

  9. FN FNC - Wikipedia

    en.wikipedia.org/wiki/FN_FNC

    FNC magazines will function in AR-15/M16-type rifles but the follower will not hold the bolt open on the last round unless they have been modified with an M16-type follower. [ 5 ] The plastic-coated, lightweight alloy skeleton stock folds to the right side of the receiver.