Serial # is 9256XXX. I comprehend it was inside a VA law enforcement dept It really is complete life and I believe it had been produced all-around seventy four-75 timeframe. No added engraving or markings from dept, selector marked safe-semi-vehicle. Hope that assists the database Tony. For those who stumble https://coltcombatelitecommander402344.bimmwiki.com/10502689/the_greatest_guide_to_colt_m16a1_for_sale