The most compact AR upper on the market. Period.
Introducing the AR-15 Complete Bufferless 9mm Pistol-Length Upper Assembly. Crafted to precision, this upper boasts a 5" M4 barrel finished with durable parkerization, featuring a 1:10 twist rate and a reliable blowback gas system.
Includes Sealed, Bufferless End Plate
This bufferless 9mm upper includes a unique, sealed end plate. The plate features a Picatinny rail for attaching a folding stock adapter!
Other Upper Features
Also included is a 4" MLOK rail, and M4 flat-top billet upper receiver. Equipped with a top-tier 9mm bolt carrier group and a flash hider, this upper also showcases the latest Gen 2 Side Charging handle for seamless operation. Designed to seamlessly integrate with mil-spec AR9 80% lowers and retail AR9 lowers, this upper offers unparalleled performance and compatibility.
AR-9 Upper Assembly Specs
Barrel
- Chamber: 9mm
- Contour: M4
- Length: 5”
- Twist Rate: 1:10
- Gas System: Blow-back
- Muzzle Threads: 1/2x36
- Feed Ramps: Single
- Material: 4150 CMV
- Finish: Parkerization
- Process: Button Rifled
- Lining: QPQ Nitride
- Extension: M4
- Muzzle: Spiral Flash Hider
Handguard
- Attachment System: 4" 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: A3 Flattop
- Material: Forged 7075-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: 9mm / Blow-back
- Steel: 9310 Tool, HPT/MPI-tested
- Exterior: Black Nitride
- Interior: Parkerized
- Gas Key: 9mm Blow-back
- Charging Handle: Included Left-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.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Caliber:
- 9mm
- Platform:
- AR9
- Barrel Size:
- 5"
