This is a Ultradot Red Dot known as the Matchdot, model MATCHDOT II.
The Matchdot II is part of the New Ultradot 6 Series. It picks up where the Original Matchdot left off. Built for serious competitors" the new and improved sight has 4 dot sizes (2"4"6 and 8 MOA) plus two reticle patterns for added flexibility. Elevation adjustments can be made "on the fly" with Ultradot's new Bullet Drop Compensator knob and the all black finish is as rugged as it looks. The following accessories are included: Mounting Rings" Lens Covers" Tube Extension" Hex Wrench" Polarizing Filter and Battery.
Features:
2,4,6, and 8 MOA dot
Multiple reticle choices
1 MOA per click adjustments
11 brightness settings