Ultra Dot 6 AR15 Red Dot- 30mm Tube, Matte Black Featuring a 30mm Tube with 37mm objective, the Ultra Dot 6 has 4 dot sizes (2,4,6 & 8 MOA) plus two reticle patterns for added flexibility. A Bullet Drop Compensator elevation knob (1/2 MOA per click) lets you dial in the sight for longer shots. The Ultra Dot 6 is capable of achieving co-witness with standard AR iron sights (when using Warne Ultra High rings - order Warne rings separately). Dot brightness adjustment has 11 settings. Also included is a polarizing filter and rings to fit weaver style scope bases. Parallax free @ 50m. Unlimited FOV. Black matte finish. Visit our UltraDot Page.