9mm Upper Receiver Group (BB)
The Macon Armory AR9 blowback upper receiver group is a Colt-patterned, black nitride-coated, 1:10 twist barrel made of 4140 Chrome Molybdenum steel, designed for 9mm platforms.
- The description claims that the upper receiver group is guaranteed to feed.
- The description claims that the upper receiver group is built around a non-forward assist design.
Specifications
- Barrel length
- 16", 5", 8.5"
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