8.5" 300 Blackout Complete Upper with Chrome Moly HBAR Barrel, BCG, Charging Handle and Gen II 7" M-LOK Rail
The 300 Blackout was engineered for exceptional performance from compact AR-15 platforms while reliably cycling both subsonic and supersonic ammunition. This 8.5" complete upper features a durable chrome moly HBAR barrel, pistol-length gas system, Gen II 7" free-float M-LOK handguard, Mil-Spec M16-profile bolt carrier group, and 7075 aluminum charging handle for outstanding reliability, suppressor compatibility, and compact handling. It's an excellent choice for AR-15 pistol builds, short-barreled rifle configurations, and shooters looking for maximum maneuverability.
Quick Glance:
Caliber: 300 Blackout
Platform: AR-15
Barrel Length: 8.5 inches
Barrel Material: Chrome Moly Steel
Barrel Profile: HBAR
Barrel Finish: Parkerized
Twist Rate: 1:8 Twist
Gas System: Pistol Length
Handguard Length: 7 inches
Handguard Type: Gen II Free-Float M-LOK
Upper Receiver: Forged 7075-T6 Mil-Spec AR-15 Upper
Gas Block: .750" Low Profile Nitride
Muzzle Threads: 5/8x24
Muzzle Device: A2 Flash Hider with Crush Washer
Bolt Carrier Group: Included – Mil-Spec M16 Profile Nitride BCG
Charging Handle: Included – AR-15 Mil-Spec 7075 Aluminum
Headspace Checked: Yes – Manson GO and NO-GO Gauges
Assembly: Fully Assembled and Ready to Install
Full Details:
Upper Receiver:
AR-15 Mil-Spec forged aluminum upper receiver with forward assist and dust cover assembly installed. Forged from durable 7075-T6 aluminum and protected with a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish. The 7075-T6 construction provides greater strength than commonly used 6061 billet aluminum.
Barrel:
8.5" 300 Blackout barrel manufactured from durable chrome moly steel with an HBAR profile, Parkerized finish, and 1:8 twist rate. Features 5/8x24 muzzle threads, a standard AR-15 barrel extension with M4 feed ramps, and is professionally headspaced using Manson GO and NO-GO gauges. The pistol-length gas system is optimized for dependable cycling with both subsonic and supersonic ammunition, making this complete upper an excellent choice for suppressed and unsuppressed shooting.
Handguard:
Gen II 7" carbine-length narrow-profile AR-15 free-float M-LOK handguard. M-LOK slots along the 3, 6, and 9 o'clock positions provide ample room for mounting lights, grips, sling attachments, and other M-LOK compatible accessories. Machined from 6061 aircraft-grade aluminum and protected with a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish.
Gas System:
Pistol-length gas system paired with a .750" low-profile gas block featuring a durable nitride finish. This gas system is optimized for reliable cycling with both subsonic and supersonic 300 Blackout ammunition while delivering smooth operation in suppressed and unsuppressed configurations.
Muzzle Device:
A2 flash hider installed with a crush washer to help reduce visible muzzle flash while protecting the muzzle threads.
Bolt Carrier Group:
Mil-Spec M16-profile bolt carrier group with a durable nitride finish. Features a 9310 steel magnetic particle inspected (MPI) bolt and tool steel extractor for dependable reliability. The bolt is professionally headspaced with the barrel using Manson GO and NO-GO gauges to help ensure proper fit and reliable performance.
Charging Handle:
AR-15 Mil-Spec charging handle precision machined from lightweight and durable 7075 aluminum for dependable operation and long service life.
Headspace Checked:
Every complete upper is professionally headspaced using Manson GO and NO-GO gauges to help verify proper chamber dimensions, dependable function, and outstanding accuracy.
Ready to Install:
This complete upper arrives fully assembled with the bolt carrier group and charging handle installed. It is ready to attach to any standard Mil-Spec dimension AR-15 lower receiver.
Important:
This product is not a firearm and will be shipped directly to you. No FFL transfer is required.
Ballistic Barn AR-15 complete uppers are American made and machined by manufacturers specializing in Mil-Spec AR-15 components. Every complete upper is professionally headspaced using Manson GO and NO-GO gauges to help ensure proper fit, dependable function, and outstanding accuracy.
