Wound up with that upper and It can be chrome bore barrel in the future. I feel It is an A1E1 from some nomenclature I saw but not sure as I have under no circumstances observed another one particular. I figured this was designed round the time of product or https://remingtonijihd.onzeblog.com/31223056/helping-the-others-realize-the-advantages-of-colt-m16a1-for-sale