Wound up with that higher and It truly is chrome bore barrel in the future. I do think It can be an A1E1 from some nomenclature I observed but not sure as I have in no way witnessed another one. I figured this was designed round the time of product https://colt-python-6-for-sale51492.mappywiki.com/1082805/the_best_side_of_gold_cup_trophy_colt_45