Wound up with that upper and It truly is chrome bore barrel in the future. I feel It really is an A1E1 from some nomenclature I observed but not sure as I have never ever found A further one. I figured this was manufactured within the time of products enhancement https://coltcombatunitrailgun4535566.wikibestproducts.com/1086954/the_5_second_trick_for_colt_combat_elite_commander_45_acp