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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.
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 class of firearm was originally termed the rifled gun, with the verb to rifle referring to the early modern machining process of creating grooves with cutting tools. By the 20th century, the weapon had become so common that the modern noun rifle is now often used for any log-shaped handheld ranged weapon designed for well-aimed discharge ...
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.
Model 1863 Springfield rifled musket and Pattern 1861 Enfield musketoon Springfield and Enfield actions. The Pattern 1861 Enfield musketoon was a short-barrel version (610 mm or 24 inches) of the Pattern 1853 Enfield rifled musket, having a faster rifling twist rate (1:48 versus 1:78), along with more rifling grooves (five grooves versus the Pattern 1853's three grooves), which made it as ...
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 ...
The Mountie has a magazine capacity of 20 Short, 16 Long or 15 Long Rifle .22 cartridges. Since 1954 Marlin has used their proprietary Micro-Groove rifling in the Model 39A. This rifling uses many small lands and grooves rather than 2, 4, or 6 deeper grooves used by the majority of rifle makers. The rifling is also made to a 1 in 16" right hand ...
The rifle received a new barrel with a chrome-lined bore and 4 right-hand grooves at a 200 mm (1:7.87 in) or 37 calibers rifling twist rate. The front sight base and gas block were redesigned. The gas block contains a gas channel that is installed at a 90° angle in relation to the bore axis to reduce bullet shear at the port hole.