BARSKA 4x30 IR Electro Sight Rifle Scope lets you add as many accessories as you need! This Barska rifle scope features three integrated 7/8" Picatinny tactical rails which allow you to customize your scope with additional aiming accessories. BARSKA Multi-Rail Electro Sights are designed specifically for tactical shooters that need a versatile scope for both short distance quick acquisition shooting and medium to long distance shooting. This Barska innovation lets you easily attach a laser sight, flashlight or secondary sight and use it in combination with the rifle scope. One ideal use for the scope's external rails is 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. The Barska IR Electro Sight comes with a dual color red/green illuminated mil-dot reticle.