Machined aluminum mount lets you install a Trijicon RMR reflex sight on a 30mm scope tube. Enables fast transition from long-range to close-in targeting simply by moving your eye. Lets you position the RMR to the left, right, or at any angle in between. Can also replace the ring top half on Precision Reflex 30mm scope rings. Mfg: Precision Reflex SPECS: 6061 T6 aluminum, hardcoat anodized, black. 1A 3/4" (4.4cm) long, 17/8" (4.7cm) wide, 1A 3/4" (4.4cm) high. 2 oz. (57g) wt.