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  2. Barrel threads - Wikipedia

    en.wikipedia.org/wiki/Barrel_threads

    Very common on European hunting rifles. Also used on some airsoft guns (although often in the left-hand version). 71/128"-25.4 M15.88 1.058 mm Very common on American rifles chambered for the 7.62 caliber (for example .300 BLK, 7.62x39 mm, .308 Win) 5/8"-24 M18 1 mm Common on European rifles with bull barrels. 45/64"-25.4

  3. Scope mount - Wikipedia

    en.wikipedia.org/wiki/Scope_mount

    An old German machinegun telescopic sight with scope rings Two Colt Python revolvers, one (above) with barrel-mounted scope A re-enacted Confederate sharpshooter aiming a Whitworth rifle with a ring-mounted scope, secured by clamping onto the gunstock A one-piece scope mount (with three 30 mm rings) on a Sako TRG-42. Ring mounts usually consist ...

  4. Weaver rail mount - Wikipedia

    en.wikipedia.org/wiki/Weaver_rail_mount

    Another form of scope canting is caused by the rings themselves. Many Weaver-type mounts, including many Picatinny-type scope rings and even the Redfield Type, have either two or four screws on top of the scope ring that hold the scope in place. Both the Weaver and Picatinny clamp systems have a screw side and a clamp side.

  5. Leupold & Stevens - Wikipedia

    en.wikipedia.org/wiki/Leupold_&_Stevens

    Leupold & Stevens, Inc. is an American manufacturer of telescopic sights, red dot sights, binoculars, rangefinders, spotting scopes, and eyewear located in Beaverton, Oregon, United States. The company, started in 1907, is on its fifth generation of family ownership.

  6. M24 sniper weapon system - Wikipedia

    en.wikipedia.org/wiki/M24_Sniper_Weapon_System

    Scope: Leupold Ultra M3A 10×42mm fixed power, or Leupold Mk 4 LR/T M3 10×40mm fixed power scope. Detachable emergency Redfield-Palma International back-up iron sights, they are attached to iron sight bases that are screwed into drilled and tapped holes machined into the front of the barrel and back on the left side of the receiver. In 2001 ...

  7. Telescopic sight - Wikipedia

    en.wikipedia.org/wiki/Telescopic_sight

    The scope base is the attachment interface on the rifle's receiver, onto which the scope rings or scope mount are fixed. Early telescopic sights almost all have the rings that are fastened directly into tapped screw holes on the receiver, hence having no additional scope base other than the receiver top itself.

  8. Jacob Leupold - Wikipedia

    en.wikipedia.org/wiki/Jacob_Leupold

    Jacob Leupold (22 July 1674 – 12 January 1727) was a German physicist, mathematician, instrument maker, mining commissioner and engineer. He wrote the seminal book Theatrum Machinarum Generale ("The General Theory of Machines").

  9. Barrett Optical Ranging System - Wikipedia

    en.wikipedia.org/wiki/Barrett_Optical_Ranging_System

    The BORS mounted atop a Leupold Mark 4 M1. The computer built into the BORS, constantly updates to account for changing factors. Barrett states that the BORS "instantly takes care of the data work so the shooter can focus on the task of putting lead on target."