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  2. List of military headstamps - Wikipedia

    en.wikipedia.org/wiki/List_of_military_headstamps

    The pre-war headstamp has the 1- or 2-letter code for the brass supplier of the cartridge case at 6 o'clock, the 2-digit year the cartridge case was produced at 12 o'clock, the lot number of the propellant at 9 o'clock, and the 2-digit year the finished cartridge was assembled at 3 o'clock. The brass suppliers or cartridge manufacturers would ...

  3. 56th Operations Group - Wikipedia

    en.wikipedia.org/wiki/56th_Operations_Group

    F-16 of the 62d Fighter Squadron ready for takeoff at Luke F-16C Block 42J Fighting Falcon 90-0768 flies over the White Sands Missile Range in New Mexico during a QF-4 drone chase. 425th FS F-16CJ Block 52 Fighting Falcon 97–120. The 56th Operations Group is a unit of the United States Air Force, and the flying component of the 56th Fighter Wing.

  4. USAAF unit identification aircraft markings - Wikipedia

    en.wikipedia.org/wiki/USAAF_unit_identification...

    A letter denoting the group was painted on the upper third of the tail fin, with a square symbol in the center, and an aircraft identifier, known as the "victor number," in the lower third. Aircraft commonly used their tail identifiers as radio voice calls ( call signs ), i.e. Lucky Irish (serial 42-24622) of the 870th Bomb Squadron, 497th Bomb ...

  5. Block letters - Wikipedia

    en.wikipedia.org/wiki/Block_letters

    Block letters may also be used as to refer to block capitals, which means writing in all capital letters or in large and small capital letters, imitating the style of typeset capital letters. [2] However, in at least one court case involving patents , the term "block letters" was found to include both upper and lower case .

  6. .22 long rifle - Wikipedia

    en.wikipedia.org/wiki/.22_Long_Rifle

    A .22 Short, .22 long rifle, .22 Winchester Magnum, and a .22 Hornet. The .22 long rifle uses a straight-walled case. Depending upon the type and the feed mechanism employed, a firearm that is chambered for .22 long rifle may also be able to safely chamber and fire shorter rimfire cartridges, including the .22 BB, .22 CB, .22 short, .22 long.

  7. Block letters (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Block_letters_(disambiguation)

    Block letters are a form of handwriting. It can also refer to: A style of business letter format. The letters at the start and finish of the serial number on a piece of U.S. currency, most commonly Federal Reserve Notes. Originally these letters were not actually letters, but rather a collection of elaborate symbols.

  8. Remington Model 513 - Wikipedia

    en.wikipedia.org/wiki/Remington_Model_513

    The "S" variant is medium-weight sporter rifle. Model 513TS or 513S rifles were sporter models equipped with regular sporting-style sights. The "S" had a non-target-type barrel, a ramp or post front sight, and lacked the rear receiver mounting block for a rear aperture sight. The Model 513TX was set up for a scope and came with no sights.

  9. Intratec TEC-22 - Wikipedia

    en.wikipedia.org/wiki/Intratec_TEC-22

    The TEC-22 operates using a straight blow-back action. [6] The TEC-22 is constructed largely from molded plastic and stamped metal parts. The materials used, along with its extremely simple design allowed the gun to be made and marketed inexpensively. The TEC-22 is designed to use magazines and drums made for the popular Ruger 10/22 rifle. [7]