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  2. Sawed-off shotgun - Wikipedia

    en.wikipedia.org/wiki/Sawed-off_shotgun

    A sawed-off break-action shotgun of the type commonly known as a lupara. A sawed-off shotgun (also called a scattergun, sawn-off shotgun, short-barrelled shotgun, shorty, or boom stick) is a type of shotgun with a shorter gun barrel—typically under 18 inches (46 cm)—and often a pistol grip instead of a longer shoulder stock.

  3. Shotgun - Wikipedia

    en.wikipedia.org/wiki/Shotgun

    The minimum barrel length for shotguns in most of the U.S. is 18 inches (460 mm), and this barrel length (sometimes 18.5–20 in (470–510 mm) to increase magazine capacity and/or ensure the gun is legal regardless of measuring differences [3]) is the primary choice for riot shotguns. The shorter barrel makes the weapon easier to maneuver ...

  4. Gun barrel - Wikipedia

    en.wikipedia.org/wiki/Gun_barrel

    A female worker boring out the barrel of a Lee-Enfield rifle during WWI. Gun barrels are usually made of some type of metal or metal alloy.However, during the late Tang dynasty, Chinese inventors discovered gunpowder, and used bamboo, which has a strong, naturally tubular stalk and is cheaper to obtain and process, as the first barrels in gunpowder projectile weapons such as fire lances. [2]

  5. Glossary of firearms terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firearms_terms

    Combination gun: A shoulder-held firearm that has two or more barrels; and at least one rifle barrel and one shotgun barrel. Most combination guns are of an over-under design (O/U), in which the two barrels are stacked vertically on top of each other, but side-by-side (SxS), in which the two barrels are parrarel to one another are also made.

  6. Double-barreled shotgun - Wikipedia

    en.wikipedia.org/wiki/Double-barreled_shotgun

    The change from one barrel to the other may be done by a clockwork type system, where a cam alternates between barrels, or by an inertial system where the recoil of firing the first barrel toggles the trigger to the next barrel. A double-barreled shotgun with an inertial trigger works best with full power shotshells; shooting low recoil ...

  7. Gun dynamics - Wikipedia

    en.wikipedia.org/wiki/Gun_dynamics

    The main aim of a theoretical simulation of the dynamics of the barrel, mounting, and shot, is to predict the sensitivity of the shot exit conditions to variations in the gun system parameters. This will then assist the gun designer to produce suitable designs and keep manufacturing tolerances within reasonable limits, while maintaining good ...

  8. Polygonal rifling - Wikipedia

    en.wikipedia.org/wiki/Polygonal_rifling

    Conventional eight groove rifling on the left, and octagonal polygonal rifling on the right. Polygonal rifling (/ p ə ˈ l ɪ ɡ ə n əl / pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile.

  9. Break action - Wikipedia

    en.wikipedia.org/wiki/Break_action

    Close-up of an IOF 32 break-action revolver. The first break-action revolver was patented in France and Britain at the end of December in 1858 by Devisme. [1] A substantial hinge pin joins the two parts of the rifle or shotgun; the stock with its firing mechanism and the fore-piece and barrel, which hold the round to be fired.