Trijicon RM54 RMR Mount, 3x24mm/3x30mm Compact ACOG with Bosses, 3.5x35mm LED ACOG, black Trijicon RMR Mount for 3x30 ACOG with bosses Made of 7075-T6 aluminum RM54 allows you to mount any RMR to a 3x30 ACOG with integrated mounting bosses Weight = 0.768 oz. (0.048 lbs.)