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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.
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.
A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ("rifling") cut into the barrel walls.The raised areas of the rifling are called "lands," which make contact with the projectile (for small arms usage, called a bullet), imparting spin around an axis corresponding to the orientation of the weapon.
Fluting is the removal of material from a cylindrical surface in a firearm, usually creating grooves. This is most often the barrel of a rifle , though it may also refer to the cylinder of a revolver or the bolt of a bolt action rifle.
The West Point Foundry produced about 300 20-pounder Parrott rifles between September 1861 and July 1864. The gun barrels weighted between 1,635 lb (742 kg) and 1,815 lb (823 kg). The rifling consisted of five lands and grooves of right-hand gaining twist (increasing toward the muzzle) and the caliber (bore diameter) was 3.67 in (93 mm). [6]
The 14-pounder James rifle or James rifled 6-pounder or 3.8-inch James rifle was a bronze muzzle-loading rifled cannon that was employed by the United States Army and the Confederate States Army during the American Civil War. It fired a 14 lb (6.4 kg) solid shot up to a distance of 1,530 yd (1,400 m) at 5° elevation.
Since the Brunswick used a round that was specifically designed to be mated with the grooves in the rifle, it had to be oriented properly in order to be loaded. This made the rifle difficult to load at night, when the grooves could not be seen. [4] The lock was originally a back action design, with the mainspring located behind the hammer.
The Marlin Model 60, also known as the Marlin Glenfield Model 60, is a semi-automatic rifle that fires the .22 LR rimfire cartridge. Produced by Remington Arms in Huntsville, Alabama formerly in Mayfield, Kentucky, formerly by Marlin Firearms Company of North Haven, Connecticut, it was in continuous production from 1960 to 2020 and the company says it is the most popular rifle of its kind in ...