RRA Dominator 2 that came off my new rifle. I only used it for about 150 rnds before I put an aimpoint on the rifle and it is in like new condition. This provides a fixed A2 rear sight as well as a built in riser to allow co witness of your eotech. WTS $75 shipped in the continental US. Will also look at a decent folding BUIS or a combination of a magpul AFG and magpul BUIS as a trade. Let me know what you have or if you are interested in buying. Please email at crimsontidevt @ gmail.com if interested.