The Multi-Rail Electro Sight with Laser is designed specifically for tactical shooters that need a versatile scope for short distance quick acquisition shooting to medium distance shooting. Ideally use the scopes external rails to attach a laser sight that is zeroed in at a short distance (50 yards) and then zero the scope reticle in at a longer distance (100 yards), this allows you to instantly shoot targets at two different distances. This panoramic sight with built-in external adjustable red laser features a 5/8 inch mount that is ideal for handguns, shotguns, crossbows, M-16"s and more. This Electro Sight also features 4 different red/green reticle patterns and a 5- position rheostat illumination powered by a lithium battery. Specifications: Magnification: 1x; Objective Lens: 33mm; Reticle: Multi-Reticle; Optical Coating: Multi-Coated; Field of View (ft@100yds/m@100m): 47.4/15.8; Eye Relief: Unlimited; Adjustment Knob: Adj. Rheostat Settings; Weight: 7.2 oz; Length: 3.5 Inches; Included Accessories: Battery and Lens Cloth; Warranty: Limited Lifetime.