Ergonomic performance meets compact power in this side-charging 5.56 NATO complete upper.
This AR-15 Complete Upper is a high-value, "ready-to-run" solution for your next AR pistol or short-barreled rifle (SBR) build. Chambered in 5.56 NATO, this assembly features a 10.5-inch M4 contour barrel crafted from heavy-duty 4150 Chrome Moly Vanadium steel, offering exceptional longevity and heat resistance under a classic parkerized finish. Its versatile 1:7 twist rate delivers excellent stabilization for a wide variety of bullet weights, while the carbine-length gas system ensures smooth and reliable cycling.
Engineered with a Gen2 right-side charging handle, the flat-top billet aluminum upper receiver offers superior ergonomics, making weapon manipulation and clearing fast and effortless. Up front, the barrel is wrapped in the innovative Talon 10" MLOK Split Rail handguard—slashing total rail weight by 30% compared to standard MLOK systems without sacrificing accessory real estate. Completed with a micro flash hider and a full E9310 bolt carrier group, this complete upper assembly is ready to pin directly onto any mil-spec AR-15 lower right out of the box.
Barrel
- Chamber: 5.56 NATO
- Contour: M4 Contour
- Length: 10.5"
- Twist Rate: 1:7
- Gas System: Carbine
- Gas Block: 0.750”
- Muzzle Threads: 1/2 x 28
- Feed Ramps: M4
- Material: 4150 CMV
- Finish: Parkerized
- Rifling: Button Rifled
- Muzzle: Micro Flash Hider
Handguard
- Attachment System: 10" M-Lok
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: MLOK Split Rail
- Attachment: Barrel Nut
Stripped Upper Receiver
- Profile: M4 Flattop Ride-Side Charger
- Material: Billet 7075 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: M16/Full-Auto Profile
- Steel: E9310
- Exterior: Black Nitride
- Interior: Black Nitride
- Gas Key: Staked
- Charging Handle: Included
Lower receiver sold separately.
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:
- 5.56
- Barrel Size:
- 10.5"
- Twist Rate:
- 1/7
- Barrel Finish:
- Parkerized