The 4x28 Electro Sight Tactical Multi Rail Riflescope from Barska is designed with the versatility in mind for both short-distance, quick acquisition and medium to long-distance shooting. The riflescope has been endowed with multiple Weaver style Picatinny rails for attaching aiming accessories like a laser sight or a flashlight. There are side and top rails, windage and elevation turrets, an adjustable rheostat and an illuminated Mil-Dot reticle. The reticle is red or green - user selected - or just non-illuminated black. The CR2032 battery is included. It has a 28mm tube diameter and 1/2 MOA click values. This is a tactical scope for the AR-15, M-16, M-4, SKS and other weapons, as well. It has a high impact rating for use with high-caliber large-recoil weapons.