AR-45 Upper Receiver Group (BB)



Our Macon Armory AR45 blowback upper receiver group barrel is black nitride coated and hand-crafted with a 1:16 twist and 5/8 x 24 muzzle thread using 4140 Chrome Molybdenum steel, providing both accuracy, durability and versatility. Upper includes bolt and extend buffer required for reliable operation. Not compatible with the CNC Guns AR45 lower, but runs well on most large frame Glock lowers, the Bazooka Brothers  GG mag lower, and the Macon Armory Magazine adapter for standard lowers with our proprietary magazine.


AR45 BB upper receiver group includes:

  • Barreled upper with bolt carrier group
  • Macon Armory free float Mlok forearm PHOTO does not show current forearm!!!!
  • A2 flash suppressor
  • Macon Armory extended AR45 buffer (11 Oz)

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″.


Additional information

Barrel length

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Macon Armory


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