16" 300 Blackout Upper - Shaw Match SS HBAR - 15" M-LOK Rail

16" 300 Blackout Upper for AR-15 with Shaw Match Grade Stainless Barrel and 15" M-LOK Rail

The 300 Blackout was designed to maximize performance from the AR-15 platform with both subsonic and supersonic ammunition. This 16" upper features a Shaw Match Grade 416R stainless steel HBAR barrel, pistol-length gas system, and lightweight 15" free-float M-LOK handguard for exceptional accuracy, dependable reliability, and outstanding suppressor compatibility. Whether you're hunting, target shooting, or building a precision 300 Blackout rifle, this upper delivers premium performance.

Quick Glance:

Caliber: 300 Blackout
Platform: AR-15
Barrel Length: 16 inches
Barrel Manufacturer: Shaw Barrels
Barrel Grade: Match Grade
Barrel Material: 416R Stainless Steel
Barrel Profile: HBAR
Barrel Finish: Polished Stainless
Twist Rate: 1:7 Twist
Gas System: Pistol Length
Handguard Length: 15 inches
Handguard Type: Lightweight 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
Headspace Checked: Yes – Manson GO and NO-GO Gauges
Assembly: Fully Assembled Upper Receiver Assembly

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:
Shaw Match Grade 16" 300 Blackout barrel manufactured from premium 416R stainless steel with an HBAR profile, polished stainless finish, and 1:7 twist rate. Features 5/8x24 muzzle threads, a standard AR-15 barrel extension with .30 caliber 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 upper an excellent choice for suppressed and unsuppressed shooting.

Handguard:
Premium lightweight 15" extended rifle-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 optics, bipods, 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.

About Shaw Barrels:
Shaw Custom Barrels, also known as E.R. Shaw, has been manufacturing precision rifle barrels since 1913. Their Match Grade barrels are trusted by hunters, competitive shooters, gunsmiths, and custom rifle builders for exceptional craftsmanship, consistent accuracy, and dependable long-term performance.

Headspace Checked:
Every barrel is professionally headspaced using Manson GO and NO-GO gauges to help verify proper chamber dimensions and dependable operation.

Ready to Install:
This upper arrives fully assembled and is compatible with all standard Mil-Spec dimension AR-15 lower receivers.

Important:
This product is not a firearm and will be shipped directly to you. No FFL transfer is required.

Ballistic Barn AR-15 uppers are American made and machined by manufacturers specializing in Mil-Spec AR-15 components. Every barrel is professionally headspaced using Manson GO and NO-GO gauges to help ensure dependable function and outstanding accuracy.