9mm Upper Receiver Group (BB)
- Macon Armory AR9 blowback upper receiver group is based on the Colt pattern. Featuring our guaranteed to feed barrels they are black nitride coated and hand-crafted with a 1:10 twist and 1/2 x 28 muzzle thread using 4140 Chrome Molybdenum steel, providing both accuracy, durability and versatility. Uppers are built around an Aero Precision non forward assist upper receiver and include blast deflector and 3/4 ejection port cover. All Macon Armory blowback uppers come shipped WITH the required buffer for smooth safe operation
Currently AERO Precision slick side uppers are not available, and upper receiver groups are being shipped with a billet slick side with a pistol sized ejection port without an ejection port cover. Call us for custom build options.
This blowback upper receiver group is compatible with all currently available 9mm platforms based on the Colt pattern or Glock magazine dedicated lowers.
AR9 BB upper receiver group includes:
- Barreled upper with bolt
- Free float forearm
- A2 flash suppressor
- 7.5 oz Extended Deadblow Buffer
It is the customer's responsibility to be aware of all applicable laws and regulations regarding purchase and ownership of upper receivers with a barrel length of less than 16".</em