Meprolight RMR Picatinny Red Dot Sight Mount Black 0.4in. 53in) AR Iron Sights. Squared recoil stops prevent movement under recoil Torx bolts securely holds zero (Torque rating: 35 in-lbs.). Specifications for Meprolight RMR Picatinny Red Dot Sight Mount: Manufacturer: Meprolight Color: Black Finish: Matte Black Hard Coat Anodize Gun Make: AR Platform Fabric/Material: CNC Machined 6061-T6 Aluminum Width: 0.03 in Weight: 0.25 lb Mount Type: Picatinny Ring Type: Mil-std 1913 Picatinny Package Contents: Meprolight RMR Picatinny Red Dot Sight Mount Meprolight 901141045: RMR Picatinny Red Dot Sight Mount Black 0.4in