Tactical Picatinny/Weaver Tri-rail made from aircraft grade aluminum. Features an extended top rail with 17 slots to provide adequate eye relief, 2 removable side mounts with 12 slots each and black rubber rail guards. Includes a steel base with 2 adaptors to fit in the rear sight housing of both the full length and carbine rifles. Great zero retention capability for all accessories installed on the rails. Weight: 9.2 oz Length: 8" Width: 2.4" Height: 1.7"