Angstadt Arms complete upper receiver pistol assembly is ready with any 9mm AR-15 lower receiver. Featuring the same high quality parts that go into the UDP-9 pistol, this completed upper receiver is compatible with both GLOCK and COLT style 9mm magazines.
| FireArm | No |
| Barrel Length | 6″ |
| Caliber | 9mm |
| Twist | 1:10″ |
| Barrel Material | 7075-T6 Aluminum |
