The Trijicon RMRA(R)/SRO(TM) 45 Degree offset Quick Release mount Mount with Q-LOC(TM) Technology features a 7075-T6 aluminum design, with an easy to use one handed tool less mounting system.Designed to mount an RMR/SRO 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 which works with any Picatinny rail. a Matte Black Anodized Finisha Made in the USA