I have a AR15 A1 Colt no forward assist. It was bought back in the communist state of California when they first came out.So I guess its a preban since thy had just came out when it was bought. It as about 500 rounds thru it. I know allot of people are remaking ar to look like this but I'm wondering whats a good price to sell this for. I wondering if I want to sell the whole thing or if I should just keep the lower and buy a new upper for what I want. But if its worth more then a normal Colt I might sell but I need to get a price range. Any help would be great thanks.