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Tilting bolt. The bolt drops down into receiver recess and locks on bolt closing. Tilting bolt action is a type of locking mechanism often used in self-loading firearms and, rarely, in straight-pull repeating rifles. Essentially, the design consists of a moving bolt driven by some mechanism, most often a piston with gas pressure from the gas ...
A turn bolt refers to a firearm component where the whole bolt without using a bolt carrier turns to lock/unlock. This is mostly used to describe manually operated bolt action firearms, but also on some automatic firearms. The most common locking mechanism on rifles is a rotating bolt, which can be classified as a rigid type of bolt lock. Semi ...
Push feed and controlled feed (or controlled round feed) are two main types of mechanisms used in firearms to describe how the bolt drives the cartridge into the chamber and extracts the spent casing after firing. The push feed system does not grip the base of the cartridge before the cartridge has been fully entered into the chamber, and ...
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.
Battle rifle: A service rifle capable of semi-automatic or fully automatic fire of a full-power rifle cartridge. Bayonet lug: An attachment point at the muzzle end of a long gun for a bayonet. Belt: An ammunition belt is a device used to retain and feed cartridges into some machine guns in place of a magazine.
The opening lever and the safety catch are clearly visible. In firearms terminology, an action is the functional mechanism of a breech-loading firearm that handles (loads, locks, fires, extracts, and ejects) the ammunition cartridges, or the method by which that mechanism works. [1] Actions are technically not present on muzzleloaders, as all ...
The gauge (in American English or more commonly referred to as bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) of the barrel. Gauge is determined from the weight of a solid sphere of lead that will fit the bore of the firearm and is expressed as the multiplicative inverse of the ...
Boresight (firearm) Boresighting is a method of visually pre-aligning a firearm barrel 's bore axis with the target, in order to more easily zero the gunsight (optical or iron sights). The process is usually performed on a rifle, and can be accomplished either with the naked eye, or with a specialized device called a boresighter. [1]