Maximizing 9mm's performance in the shortest upper possible.
It's generally agreed upon that, across 9mm's dozen or more loads, a 7.5" barrel effectively maximizes muzzle velocities. That's why this AR-9 upper's the perfect choice: It provides the most performance downrange across all 9mm loads, while affording a compact, low profile.
Coupled with its stout M-LOK handguard and convenient side-charging BCG, this 7.5" upper is the one to get for your custom 9mm AR pistol or SBR build.
AR-9 Upper Assembly Specs
Barrel
- Chamber: 9mm
- Contour: Heavy
- Length: 7.5”
- Twist Rate: 1:10
- Gas System: Blow-back
- Muzzle Threads: 1/2x36
- Feed Ramps: Single
- Steel: 4150 CMV
- Finish: Parkerized
- Muzzle: Spiral Flash Hider
Handguard
- Attachment System: 5.5" M-Lok
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: Split Rail / 1913 / Picatinny Rail
- Material: 6061-T6 Billet Aluminum
- Attachment: Barrel Nut
Upper Receiver
- Profile: Flattop w/ Rail, Right Side Charging
- Material: Billet 6061-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: 9mm / Blow-back
- Steel: 9310 Tool, HPT/MPI-tested
- Treatment: Black Nitride
- Charging Handle: Integrated (Right Side Charging)
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
GunBuilders.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
