.22-caliber rifle
Lightweight firearm with a relatively short barrel; it shoots projectiles 5.6 mm in diameter.
cheek piece 
Movable and adjustable part against which the shooter can rest his cheek when shouldering the weapon.
hook 
Curved part that keeps the rifle under the shoulder to provide maximum stability.
rear sight 
Articulated graduated aiming device attached to the back of the barrel; the rear sight is lined up with the front sight when aiming.
cartridges 
Ammunition consisting of a projectile (ball or lead), an explosive charge (gunpowder) and a primer collected inside a casing.