Ncstar's ar-15 scope mount with quick release allows you to quickly mount a 30mm or 1" scope onto your picatinny rail.It is constructed of aluminum with a fixed front cantilever ring with an adjustable removable rear ring and includes 1" inserts.This model has a black anodized finish.Length: 4.7"Type: Scope MountModel: QR Scope MountStyle: Quick ReleaseFinish: BlackMaterial: AluminumPieces: 1Gun Type: RifleMount Type: CantileverRings Included: Yes