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  2. Gauge (firearms) - Wikipedia

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

    The term is related to the measurement of cannons, which were also measured by the weight of their iron round shot; an eight-pounder would fire an 8-pound (3.6 kg) ball. Therefore, a 12 gauge is larger than a 16 gauge. Due to problems defining a pound, and to get pure lead, the Gun Barrel Proof Act 1855 defined a gauge as a list of defined ...

  3. Semi-automatic firearm - Wikipedia

    en.wikipedia.org/wiki/Semi-automatic_firearm

    The Colt AR-15, a type of semi-automatic rifle. A semi-automatic firearm, also called a self-loading or autoloading firearm (fully automatic and selective fire firearms are also variations on self-loading firearms), is a repeating firearm whose action mechanism automatically loads a following round of cartridge into the chamber and prepares it for subsequent firing, but requires the shooter to ...

  4. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    A 16-inch gun of 50 calibers (16" L/50) has a barrel length of 50 × 16 = 800 inches (66 ft 8 in). Both 14-in and 16-in navy guns were common in World War II. The British Royal Navy insisted on 50-cal guns on ships as it would allow 1,900 to 2,700 lb (860 to 1,220 kg) shells to travel at an initial velocity of up to 1,800 mph (2,897 km/h) to a ...

  5. Semi-automatic pistol - Wikipedia

    en.wikipedia.org/wiki/Semi-automatic_pistol

    A Glock 22 semi-automatic pistol chambered in .40 S&W with a tactical light mounted below its barrel.. A semi-automatic pistol (also called a self-loading pistol, autopistol, or autoloading pistol [1]) is a repeating handgun that automatically ejects and loads cartridges in its chamber after every shot fired, but only one round of ammunition is fired each time the trigger is pulled.

  6. Glossary of firearms terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firearms_terms

    Caliber/calibre: In small arms, the internal diameter of a firearm's barrel or a cartridge's bullet, usually expressed in millimeters or hundredths of an inch; in measuring rifled barrels this may be measured across the lands (.303 British) or grooves (.308 Winchester) or; a specific cartridge for which a firearm is chambered, such as .45 ACP or .357 Magnum.

  7. SIG Sauer P320 - Wikipedia

    en.wikipedia.org/wiki/SIG_Sauer_P320

    3.9-inch (99 mm) barrel length in carry size pistol; 4.7-inch (120 mm) barrel length in full size pistol; Ambidextrous thumb safety; chambered in 9 × 19 mm Luger (can be adapted to fire larger calibers like .357 SIG, .40 S&W, and .45 ACP) Improved slide sub-assembly to capture small components when disassembled; Improved trigger "mud flap" to ...

  8. Heckler & Koch USP - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_USP

    The USP is a semi-automatic pistol with a mechanically locked breech using the short recoil method of operation. This rather conventional lock-up system has a large rectangular lug over the barrel's chamber that rides into and engages the ejection port cut-out in the slide. When a cartridge is fired, pressures generated by the ignited powder ...

  9. CZ 100 - Wikipedia

    en.wikipedia.org/wiki/CZ_100

    Double action semi-automatic handgun: Place of origin: Czech Republic: Production history; Manufacturer: Česka Zbrojovka: Produced: 1995–present: Variants: CZ 110: Specifications; Mass: 645 g (1.42 lb) w/empty magazine 680 g (1.44 lb) w/loaded magazine: Length: 177 mm (6.96 in) Barrel length: 96 mm (3.78 in)