This model came with an A.R.M.S.#40L rear flip sight which so far seems adequate but I'm still debating with my self about an optic.I have narrowed it down to either an Eotech 312 or for some magnification(which seems to be getting to be an issue for these aging eyes) a Leupold Mark 4 CQ/T. Looked at the Mark4 at a Tanner gun show awhile back and was impressed with it. Let me know if I can be of any more help with your decision and also if you need a good dealer to go through.