I guess I should be more clear. These are upper receivers only. They are not barreled uppers, conversions, no mag blocks, hammers, etc.
The Colt 9mm upper is not marked 9mm. It is a slab side upper with the 9mm port cover and brass deflector. The ASA upper is marked ASA in the area where the forward assist would be. ASA used Alcoah Forge A2 receivers (marked AF)and shaved the FA area off.