Serial # is 9256XXX. I understand it was in the VA law enforcement dept It is really entire lifestyle and I feel it had been produced all-around 74-75 timeframe. No supplemental engraving or markings from dept, selector marked Secure-semi-car. Hope that helps the database Tony. If you stumble across any https://thebookmarkid.com/story18575296/helping-the-others-realize-the-advantages-of-colt-m16a1-for-sale