US optics SR-8 red illumination. Barely used. C2 ret. I have another one that is very used and has a distressed flat dark earth paint job with a GAP reticle and a blue illumination and an erek knob. I plan on keeping one, doesnt matter which. Its fantastic and served me well over the years but I think i should keep with the times. Though I love the USO, there are companies that are doing amazing things. Lighter, more compact, can track as well, less complicated zero stop. I still like USO. the discontinued SR8 is perhaps the best CQB scope however I am a little spoiled. I could be convinced to trade for 1.8-10 model. I also like bushnell elites, eotech vudu, leupold mark 6, mark5, mark 8sa of course with cash if its worth more or just flat out sell one of these scopes. Contact me for pics of both.