I bought this Acog in September and put a wilson combat mount on it put it on top of my Sabre defence and put it in the safe. I sold the sabre a few weeks ago and am not going to use this. The acog is new and never been out of the house. It is a model TA31RCO-m4CP. The unit retails for $1673. I will take $1100 shipped for it. I can do paypal as a gift or +3% Not looking for trades. TA31RCO-A4CP ACOG - Trijicon, Inc.