SPECS Materials: 7075-T6 Aluminum / 4140H Steel Finishes: Type III Anodizing / Flash Nitride Center height over rail: 1.42or 1.57" Co-Witness: Absolute (1.42") or Lower-Third (1.57") Weight: 1.45oz Origin: United States of America COMPATIBILITY Rails: MIL-STD-1913 Picatinny Trijicon reflex sights: MRO, MRO HD, MRO Patrol INCLUDED Mount: ScalarworksLeap(TM) Fasteners: #4-48x0.22Nyloktreated Tools: T10 Torx driver bit