• A telescopic sight, commonly called a scope, is a device absorbed to give additional accuracy using a point of mark for weapons such as firearms, airguns and crossbows

• Other sighting systems are robust sights, red dot sights, and laser sights.

Some end and military style telescopic sights without parallax compensation may be adjusted to be parallax free at ranges up to 300 yd/m to make them preferable out of its element for aiming at attract ranges. Scopes for rimfires, shotguns, and muzzleloaders will have shorter parallax settings, commonly 50 yd/m for rimfire scopes and 100 yd/m for shotguns and muzzleloaders. Scopes for airguns are bare often found with adjustable parallax, usually in the form of an adjustable objective, or AO. These Rifle Scope may adjust down as far as 7.5 yards.