AR-45 Upper Receiver Group (BB)
Our Macon Armory AR45 blowback upper receiver group is based on the Colt pattern. Our barrels are 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. Uppers are built around an Aero Precision non forward assist upper receiver and include blast deflector and 3/4 ejection port cover.
This blowback upper receiver group is compatible with the Macon Armory AR45 magazine and magazine well adapter, This receiver has been tested without malfunction on Quartercircle 10, New Frontier Armory, and Palmetto State Armory large frame Glock magazine lowers, and with the Angstadt Arms Glock Large Frame lower receiver.
CAUTION: It has recently come to my attention that some New Frontier large frame Glock magazine lowers have a magazine height that actually interferes with the bolt on the AR45 Blownback upper. Until we can confirm if this is a permanent change, or just a QC issue, we unfortunately can't confirm the compatibility of this lower with out products.
AR45 BB upper receiver group includes:
- Barreled upper with bolt
- Heavy Buffer
- KeyMod free float forearm
- A2 flash suppressor
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