Replica Aimpoint M2 style dot sight with a low mount. Build quality is very good and the glass is clear, nice click adjustment on the turrets. Overall condition is very good with some signs of light use. 

The dot illuminates red and green with a couple of brightness levels for each (the photos seem to dim the brightness of the dot a bit). Runs on a single AAA battery - fresh battery fitted. 

Comes with a rubber lens protector that covers both ends. I added a couple of very small strips of thin aluminium to the underside of the sight to get a slightly tighter fit on the RIS rail, this can probably be quite easily removed if not required. 

Sold as seen with no warranty either given or implied. Happy to post 😄

Thanks