External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight.
A gun barrel is a crucial part of gun-type ranged weapons such as small firearms, artillery pieces and air guns.
Iron sights are a system of shaped alignment markers (usually metal) used as a sighting device to assist in the aiming of a device such as a firearm, crossbow, or telescope, and exclude the use of optics as in reflector (reflex) sights, holographic sights, and telescopic sights.
Match grade frequently refers to quality firearm parts and ammunition that are suitable for a competitive match.
Natural frequency is the frequency at which a system tends to oscillate in the absence of any driving or damping force.
In firearms terminology, the firearm receiver or firearm frame is the part of a firearm which provides housing for internal components such as the hammer, bolt or breechblock, action and firing mechanism, and is usually threaded at its forward portion to "receive" the barrel and has screw holes on the bottom and/or rear to receive the stock and grip.
A rifle is a portable long-barrelled firearm designed for precision shooting, to be held with both hands and braced against the shoulder for stability during firing, and with a barrel that has a helical pattern of grooves ("rifling") cut into the bore walls.
Rifle bedding is a process of providing a rigid and consistent foundation for a rifle’s operational components, by creating a stable and close-fitting bearing surface between the gun’s functional parts (i.e. the receiver housing the barrelled action) and its support part (i.e. the stock) that do not deform with pressure or shift under the shear stress of the recoil from firing.
A gunstock, often simply stock, also known as a shoulder stock, a buttstock or simply a butt, is a part of a long gun such as rifle, to which the barrelled action and firing mechanism are attached and is held against the user's shoulder when shooting the gun.
Wood warping is a deviation from flatness in timber as a result of stresses and uneven shrinkage.