| Term |
Definition |
| Receiver |
The frame or action body of a firearm. |
| Recoil |
The sudden backward push made against the shooter when a firearm is fired. |
| Reticle |
"A matrix of dots, posts or lines, visible inside a rifle's telescopic sight, normally adjustable via exterior knobs for windage and elevation.
" |
| Revolver |
A revolver is a multishot firearm, usually a handgun, in which the rounds are held in a revolving cylinder that rotates to fire them through a single barrel. Most commonly, such guns have a five- or six-shot capacity; however, some revolvers have up to a 10-shot capacity. A revolver is a multi-shot firearm, usually a handgun, in which the rounds are held in a revolving cylinder that rotates to fire them through a single barrel. Most commonly, such guns have a five- or six-shot capacity; however, some revolvers have up to a 10-shot capacity. |
| Rifle |
A rifle is a firearm designed to be fired from the shoulder, which fires a single projectile (bullet) through a barrel which contains spiral grooves in its bore. Rifles come in many shapes, sizes, and types. The most common types are bolt action, lever action and semi-automatic, but rifles also come in slide-action (pump) and single-shot varieties. |
| Rifled Slug |
A shotgun projectile that has rifling or groves cut on the projectile to put twist on the projectile as it travels down the barrel. Commonly used on smooth bore shotgun barrels. Also know as a Foster Slug. |
| Rifling |
"Spiral grooves cut into the inside of a barrel that impart a rapid spin to the single projectile, stabilizing it in flight for greatly improved accuracy over that of a smoothbore gun.
" |
| Rimfire |
A cartridge where the primer is on the rim of the cartridge rather than the center of the cartridge. |
| Rotary Magazine |
The rotary or spool magazine consists of a star-shaped rotor, or sprocket, actuated by a torsion spring. |
