THE GREATEST GUIDE TO COLT M16A1 FOR SALE

Wound up with that higher and it's chrome bore barrel down the road.  I do think It is an A1E1 from some nomenclature I noticed but undecided as I have in no way found Yet another just one. I figured this was produced throughout the time of merchandise enhancement into the M16A2 ?. I can perform pictures  if requested .... perfectly I tried, but