Basically new EoTech 512. Priced to sell. I'm going to the Keys next tuesday and could use some money for equipment. I bought it a couple of months ago right before the hype and thought it would be worth having. Its been mounted on the gun but only used a couple of times since being mounted. Great Sight. It's an EoTech, need I say more?? Comes with case, paperwork, ect.