Mepro M21 yellow/amber reticle. I read it’s a Diamond/triangle, but my astigmatism only sees a dot and the camera doesn’t show it well. I recommend researching M21 reticle. It uses similar technology to the ACOG with fiber optic and other light producing technology so it does not require battery and is always on. The mount is quick detach with 2 levers and the optic is in good shape as shown in photos. I got it on a weapon I bought used and I’ve never shot with it so I have no range report to share on its performance. Sold as is. No returns. No international shipment.