The TacFire BU-300-16 Complete Upper Assembly in 300 Blackout provides a ready-to-install solution for building or upgrading an AR-15 rifle with subsonic and supersonic capability. This complete upper features a 16 inch Black Nitride barrel, 7075-T6 aluminum receiver, 15 inch M-LOK free float handguard, and includes a bolt carrier group for shooters seeking versatile performance for hunting, home defense, and suppressed shooting.
Key Features
- Manufacturer Part Number: BU-300-16
- Caliber: 300 AAC Blackout
- Barrel Length: 16 inches, 4150 Chrome Moly Vanadium steel with Black Nitride finish
- Barrel Twist Rate: 1:8
- Barrel Thread: 5/8x24 with A2 style flash hider
- Gas System: Pistol length with low profile gas block
- Gas Block Journal: .750 inch
- Upper Receiver: 7075-T6 forged aluminum with Black Anodized finish
- Handguard: 15 inch M-LOK free float rail with Black Anodized finish
- Bolt Carrier Group: Included
- Charging Handle: Included
- Forward Assist: Installed
- Ejection Port Cover: Installed
- UPC: 729205501050
Special Features
- Complete upper assembly includes all components needed except lower receiver for immediate installation
- Black Nitride barrel finish provides superior corrosion resistance and reduced friction compared to phosphate coatings
- M-LOK handguard accepts direct mount accessories without bulky rail sections for weight savings and ergonomics
- Free float handguard design eliminates contact with barrel for improved accuracy potential
- 1:8 twist rate stabilizes both subsonic heavy bullets and supersonic lighter projectiles across full 300 Blackout range
- Pistol length gas system provides reliable cycling with subsonic and suppressed ammunition
- 5/8x24 threading accepts most 30 caliber suppressors and muzzle devices without adapters
- Forged 7075-T6 aluminum receiver provides mil-spec strength and accepts all standard AR-15 components
- Low profile gas block fits under free float handguard for clean appearance and snag-free operation
- Full length Picatinny top rail accommodates any optic from red dots to magnified scopes
Practical Benefits
- 300 Blackout chambering delivers 30 caliber power from standard AR-15 magazines and bolt systems without separate platform
- 16 inch barrel meets legal rifle length requirements while maximizing subsonic performance and supersonic velocity
- Included bolt carrier group eliminates need to source separate components for complete build
- M-LOK mounting system allows attachment of lights, grips, and bipods at preferred positions for hunting or tactical use
- Free float design improves accuracy for precision shooting at 100 to 200 yards on game or targets
- Pistol length gas system ensures reliable function with suppressed subsonic loads for hearing-safe shooting
- Black Nitride finish resists corrosion during field use in wet conditions or storage without frequent maintenance
- 1:8 twist stabilizes everything from 110 grain supersonic hunting bullets to 220 grain subsonic projectiles
- Drop-in installation onto any mil-spec AR-15 lower receiver takes minutes with standard tools
- A2 flash hider controls muzzle flash and can be easily replaced with suppressor or compensator
The TacFire BU-300-16 Complete Upper Assembly 300 Blackout is a practical choice for shooters building a versatile AR-15 platform capable of supersonic hunting, subsonic suppressed shooting, and home defense applications.
| MANUFACTURER | TACFIRE |
| CALIBER | 300 BLACKOUT |