Serial # Is 9256XXX. I understand it was inside a VA police dept It truly is entire everyday living and I think it had been made all around seventy four-seventy five timeframe. No more engraving or markings from dept, selector marked Secure-semi-automobile. Hope that can help the database Tony. For https://socialicus.com/story3897744/indicators-on-colt-m16a1-for-sale-you-should-know