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Combination guns generally have a selector that allows the user to choose which barrel will fire. Three-barrel versions known as Drillings, are commonly found with two shotgun barrels and one rifle barrel, and generally have two triggers, one for each shotgun barrel, and a selector that will allow one trigger to fire the rifle barrel.
Below is a list of multiple-barrel firearms of all forms from around the world. [1. Pistols. Name Manufacturer Image Cartridge Country Year Arsenal Firearms AF2011A1 ...
An 18-inch (457 mm) (MOD 0/1) or 16-inch (406 mm) (MOD H) threaded-muzzle match-grade free floating stainless steel heavy barrel with a 1:7 (178 mm) rifling twist ratio is standard for the SPR. [11] [3] [13] The barrels are manufactured by Douglas Barrels with a unique contour that reduced weight but maintained rigidity for accuracy. [14]
Remington Model 95 with pearl grips and barrels open for reloading COP .357 Magnum derringer. The original Philadelphia Deringer was a small single-barrel, muzzleloading caplock pistol designed by Henry Deringer (1786–1868) and produced from 1852 to 1868, and was a popular concealed carry single-shot handgun of the era widely copycatted by competitors. [6]
Rifling of a 105 mm Royal Ordnance L7 tank gun Conventional rifling of a 90 mm M75 cannon (production year 1891, Austria-Hungary) Rifling in a GAU-8 autocannon. Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy.
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 ...
While standard rifle barrels taper from breech to muzzle, high precision rifles will often use a barrel with far less taper, called a heavy barrel, sometimes leaving the barrel cylindrical all the way to the muzzle, called a bull barrel. Either technique greatly increases the stiffness of the barrel by enlarging the average diameter, but this ...
This is for a number of reasons but predominantly because the barrels of an over-and-under gun must be pivoted much farther down to clear the lower barrel for reloading. [4] During manufacture the barrels of double rifles require "regulation" to ensure the bullet paths from both barrels are aimed at a common point of aim.