Trijicon AC32071 Quick Release Mount For Trijicon Quick Release Style Black Finish The Trijicon MRO 1/3 co-witness quick release mount features a mil-spec drop test rated 7075-T6 aluminum design, with a easy to use one handed tool less mounting. Type: Quick Release Mount Model: Trijicon Style: Quick Release Finish: Black Material: Aluminum Pieces: 1 Length: 1.8"