EOtech model 552 sight unit. Sold the rifle, no use for this unit anymore. It was mounted on my AR but never abused in any way, has box, papers, and everything. $300 OBO shipped out. EOtech model 512 holographic sight unit. This one is new in the box, unused. $285 OBO shipped out. Open to offers if you want both sight units. Paypal/MO only please.