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Long recoil operation is found primarily in shotguns, particularly ones based on John Browning's Auto-5 action. In 1885 a locked breech, long recoil action was patented by the Britons Schlund and Arthur. [9] In a long recoil action, the barrel and bolt remain locked together during recoil, compressing the recoil springs.
One of the most common single-action rifles would be the New England Firearms' inexpensive break-open rifles, which are built on their 12 gauge break-open shotgun actions. The rifles, however, are made on a heat-treated steel action, and the shotgun actions are not heat-treated. Any rifle frame may accept rifle or shotgun barrels.
The off-center nature of the recoil in a side-by-side gun may make shooting the body-side barrel slightly more painful by comparison to an over-and-under, single-shot, or pump-action, lever-action shotgun. Gas-operated and Recoil-operated, designs will recoil less than either.
The Auto-5 has a system of bevel rings and a friction piece or pieces, which retard the barrel's rearward travel. Setting these rings correctly is vital to good shotgun performance and to ensure a long life to the weapon, by controlling excessive recoil. The friction rings are set based on the type of load to be fired through the gun.
The recoil force only acts during the time that the ejecta are still in the barrel of the gun. The counter-recoil force is generally applied over a longer time period and adds forward momentum to the gun equal to the backward momentum supplied by the recoil force, in order to bring the gun to a halt.
The usual recoil system in modern quick-firing guns is the hydro-pneumatic recoil system. In this system, the barrel is mounted on rails on which it can recoil to the rear, and the recoil is taken up by a cylinder which is similar in operation to an automotive gas-charged shock absorber, and is commonly visible as a cylinder mounted parallel to ...
A single point cutter is drawn down the bore by a machine that controls the rotation of the cutting head relative to the barrel. This is the slowest process, but requires the simplest equipment. It is often used by custom gunsmiths as it can result in very accurate barrels.
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 ...