Aimshot HGD2 Multi Dot Reflex Sight. Easily switch between 4 dot sizes with a flip of a switch.
With a rugged body and lens, the HGD2 is perfect for high powered rifles and durable enough for everyday use. Shaded 34 mm reflex lens provides a sharp image in all light conditions and is suitable for rapid firing and tracking moving targets.
Completely parallax free and unlimited eye relief. Extra long battery life for continuous use. Built in Weaver® type mount for Picatinny rails. Can be quickly mounted and removed without the use of tools.Here's "the skinny":