16" 8.6 Blackout Upper with Shaw Match Grade Stainless HBAR Barrel, Aero Precision M5 Receiver and 15" M-LOK Rail
The 8.6 Blackout is a specialized large-bore cartridge designed for the AR-10 platform, offering impressive performance with heavy subsonic projectiles and versatility for suppressed hunting applications. Known for its fast 1:3 twist rate, the 8.6 Blackout is designed to stabilize long, heavy .338 caliber bullets while delivering substantial energy from a compact cartridge. This upper features a Shaw Match Grade 416R stainless steel HBAR barrel with a 1:3 twist, carbine-length gas system, Aero Precision M5 .308 upper receiver, and lightweight free-float M-LOK handguard, providing an excellent configuration for hunting, target shooting, and custom large-frame AR builds.
Quick Glance:
Caliber: 8.6 Blackout
Platform: AR-10 - Aero Precision M5
Barrel Length: 16 inches
Barrel Manufacturer: Shaw Barrels
Barrel Grade: Match Grade
Barrel Material: 416R Stainless Steel
Barrel Profile: HBAR
Barrel Rifling: Button Rifled
Twist Rate: 1:3 Twist
Gas System: Carbine Length
Handguard Length: 15 inches
Handguard Type: Lightweight Free-Float M-LOK
Upper Receiver: Aero Precision M5 .308
Gas Block: .750" Low Profile Nitride
Muzzle Threads: 5/8x24 - Verify Before Publishing
Muzzle Device: A2 Flash Hider
Headspace Checked: Yes - Manson GO and NO-GO Gauges
Assembly: Fully Assembled and Ready to Install
Full Details:
Upper Receiver:
Aero Precision M5 .308 upper receiver manufactured from durable 7075-T6 aluminum with a matte black hard coat anodized finish. Designed for the Aero Precision M5 large-frame platform, this receiver provides a strong foundation for the 8.6 Blackout upper assembly. Features an installed forward assist and dust cover assembly.
Barrel:
Shaw Match Grade 16" 8.6 Blackout barrel manufactured from 416R stainless steel with an HBAR profile, button rifling, and fast 1:3 twist rate designed for stabilizing heavy .338 caliber projectiles. Features 5/8x24 muzzle threads (verify specification), a DPMS-style barrel extension with .308 feed ramps, and is individually headspace checked using Manson GO and NO-GO gauges.
Handguard:
Premium lightweight 15" extended rifle-length narrow-profile AR-10 free-float M-LOK handguard. M-LOK slots run along the 3, 6, and 9 o'clock positions, allowing easy installation of compatible sights, bipods, lights, grips, lasers, and other accessories. Machined from 6061 aircraft-grade aluminum with a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish.
Gas System:
Carbine-length gas system paired with a .750" low-profile gas block featuring a durable nitride finish.
Muzzle Device:
A2 flash hider installed with a crush washer on 5/8x24 muzzle threads (verify thread specification).
About Shaw Barrels:
Shaw Custom Barrels, also known as E.R. Shaw, was established in 1913 and is a respected manufacturer of rifle barrels and firearm components. Shaw barrels are widely used by gunsmiths and custom rifle builders for their precision, craftsmanship, consistent accuracy, and dependable performance.
Compatibility:
This upper assembly is designed exclusively for Aero Precision M5 .308 lower receivers. It is not intended for use with other AR-10 or large-frame lower receiver platforms. Verify that your lower receiver is an Aero Precision M5 .308 before purchasing.
Ready to Install:
This upper arrives fully assembled and ready to install on a compatible Aero Precision M5 .308 lower receiver.
Important:
This product is not a firearm and will be shipped directly to you. No FFL transfer is required.
Ballistic Barn AR-10 uppers are American made and machined by manufacturers specializing in large-frame AR components. Every barrel is individually checked for proper headspace using Manson GO and NO-GO gauges to help ensure reliable function and accuracy.
