Basically new in box, I mounted it in a cantilever mount (comes with the mount) and that’s about all I’ve ever done with it. The illuminated FFP BDC reticle provides outstanding low-light performance and accurate holdovers out to 500 yards with 5.56 NATO. It is calibrated for use with 223 Rem/5.56 ammunition loaded with 55-62 grain bullets. I have another one on my AR and I love it. Price is firm and fair can meet at Academy by 1604/Gold Canyon. 210-254-7531