Those are the sole copy handguards which have very little hex headed screws that keep the heat shields set up. The replica Colt handguards actually have rivets (much like the genuine matter) holding the heat shields in place. The barrel is a 1970's or 1980's, simply because which is if https://gold-cup-trophy-colt-4568011.birderswiki.com/1037771/not_known_facts_about_colt_combat_unit_rail_gun_45