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  2. 12 mm caliber - Wikipedia

    en.wikipedia.org/wiki/12_mm_caliber

    This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range. Length refers to the cartridge case length. OAL refers to the overall length of the cartridge. Bullet refers to the diameter of the bullet. Some measurements are in millimetres, while others are measured in inches.

  3. Gauge (firearms) - Wikipedia

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

    A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in). Some also claim an increased velocity with the overbored barrels, up to 15 m/s (49 ft/s), which is due to the larger swept volume of the overbored barrel.

  4. 12 mm Lefaucheux - Wikipedia

    en.wikipedia.org/wiki/12_mm_Lefaucheux

    19.9 mm (0.78 in) Overall length. 30.8 mm (1.21 in) The 12mm Lefaucheux is a metallic center-fire cartridge. It was originally created as a rimless pinfire cartridge using black powder employed by the French navy on the Lefaucheux M1858 revolver. Later it was adapted to a center-fire cartridge by the French Army in 1873 for use on the MAS 1873 ...

  5. List of cartridges by caliber - Wikipedia

    en.wikipedia.org/wiki/List_of_cartridges_by_caliber

    11 mm (.433+ caliber) 12 mm (.472+ caliber) 13 mm (.511+ caliber) See also. Table of handgun and rifle cartridges; By name. List of Winchester Center Fire cartridges;

  6. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  7. 12.7 × 108 mm - Wikipedia

    en.wikipedia.org/wiki/12.7_×_108_mm

    Contents. 12.7 × 108 mm. The 12.7 × 108 mm cartridge is a 12.7 mm heavy machine gun and anti-materiel rifle cartridge used by the former Soviet Union and Warsaw Pact countries, including Russia, China, Iran, North Korea, and many others. It was invented in 1934 to create a cartridge like the German 13.2mm TuF anti-tank rifle round and the ...

  8. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Used for 12 mm, and 12.5 mm figure scale miniature wargaming. 1:128: 3 ⁄ 32 in: 2.381 mm A few rockets and some fit-in-the-box aircraft are made to this size. 1:120: 0.1 in: 2.54 mm: Model railways (TT) Derived from the scale of 1 inch equals 10 feet.TT model railroad scale. Used in AD&D Battlesystem Skirmishes rules. Works with 15 mm ...

  9. Ho-103 machine gun - Wikipedia

    en.wikipedia.org/wiki/Ho-103_machine_gun

    Muzzle velocity. 780 m/s (2,600 ft/s) Feed system. Belt 250 rounds. Sights. Iron. The Type 1 machine gun (signifying its year of adoption, 1941) was a Japanese aircraft-mounted heavy machine gun widely used during World War II. It was also known as the Ho-103 in general use and as the Ho-104 when utilized in flexible mounts. [3]