The Trijicon MRO; 45 Degree offset Quick Release mount features a 7075-T6 aluminum design, with an easy-to-use, one-handed toolless mounting system. Designed to mount an MRO at a 45 degree angle next to your primary optic which makes it ideal for close-range shooting. The mount features the ability to attach to either the right or left side of the weapon. It also has return to Zero features in a low weight, low profile design that works with any Picatinny rail.Matte Black Anodized Finish.SPECIFICATIONS:- Housing Material: Aluminum- Finish: Matte Black Anodized- Length: 1.5 in (38.1mm)- Width: 2.9 in (73.66mm)- Weight: 2.37 oz. (67.19g)- Feature: Offset / Secondary Optic Mounts