The new streamlined design with qd mount insures 1/4 moa re-mount capability and allows for use of back up iron sights while maintaining proper eye-relief.With burris signature polymer ring inserts it provides adjustment from 5 to 40 moa without using windage/elevation knobs.Length: 5"Model: AR-Signature QD P.E.P.RStyle: Quick DetachMaterial: SteelPieces: 1Gun Type: RifleMount Type: Picatinny/WeaverRings Included: Yes