Precision Armament SRC-16 Accessory Rail Tennalum 7068 Matte Black. Aggressive spiral cut studs on underside of rail are designed to epoxy into any position on your stock. Provides a permanent rock solid mounting platform that will survive the most severe conditions. Studs can easily be shortened to suit any mounting depth. Precision machined to tight MIL-STD 1913 dimensions from a billet of ultra strength Tennalum 7068 offering the strength of steel at a third of the weight. Fully CNC chamfered edges for enhanced sleekness and smooth handling combined with a low profile design for snag-free function. Mil-A-8625 hardcoat anodized matte black finish. All models use a standard 1-1/2 in stud spacing. Specifications for Precision Armament Severe-Duty Accessory Rails: Manufacturer: Precision Armament Color: Matte Black Finish: Mil-A-8625 Hardcoat Anodized Fabric/Material: Tennalum 7068-6511 Aluminum Height: 0.275 in Country of Origin: USA Package Contents: Precision Armament Severe-Duty Accessory Rails Precision Armament A11006: SRC-16 Accessory Rail Tennalum 7068 Matte Black