Samson dmr scope bases feature rugged styling, tested return to zero capability, and one handed quick release locking mechanisms.These mounts are constructed of 6061 t6 aircraft grade aluminum, stainless steel locking mechanisms and multi-start threading for rapid quick release action.Type: Ring and Base SetModel: DMR Scope MountStyle: Quick ReleaseMisc: 30mm RingFinish: BlackMaterial: 6061-T6 AluminumPieces: 1Mount Type: Picatinny Rail/Weaver StyleRings Included: Yes