AR-15 Line
AR-15 300 Blackout 16" Med Profile Black Shark Upper Assembly / Mlok
16 Inch 300 Blackout AR-15 Upper Assembly – Black Shark Edition
The Moriarti 16 Inch 300 Blackout Upper Assembly – Black Shark Edition combines the proven AR-15 platform with the versatility of the .300 AAC Blackout cartridge. Designed for shooters looking for a reliable, customizable, and visually distinctive upper, this configuration features a 16-inch medium profile barrel, slim M-LOK handguard, and custom Shark muzzle brake.
Built for compatibility with standard AR-15 lower receivers, this 16 inch 300 Blackout upper provides an ideal balance of accuracy, velocity, and maneuverability for range shooting, hunting applications where permitted, and custom AR-15 builds.
The .300 AAC Blackout cartridge allows shooters to take advantage of both supersonic and subsonic ammunition options, making it one of the most versatile calibers available for the AR-15 platform.
Key Features at a Glance
Caliber: .300 AAC Blackout
Platform: AR-15
Barrel Length: 16" Medium Profile
Barrel Material: 4150 CMV Steel
Barrel Finish: Nitride Treated
Twist Rate: 1:7 Button Rifled
Gas System: Pistol Length
Gas Block: .750 Low Profile Gas Block
Muzzle Thread: 5/8x24
Muzzle Device: Custom 4" Steel Shark Muzzle Brake
Handguard: 12" Mid-Length Slim M-LOK Rail
Upper Receiver: A3 Flat Top 7075-T6 Forged Aluminum
Finish: Hardcoat Anodized
BCG & Charging Handle: Not Included
Features
16" .300 AAC Blackout Barrel
The 16-inch medium profile barrel provides an excellent balance between velocity, accuracy, and handling. Manufactured from durable 4150 CMV steel with a nitride finish, this barrel is built for consistent performance and long-term reliability.
The 1:7 twist rate helps stabilize a wide range of .300 Blackout projectile weights, including common subsonic and supersonic loads.
Custom Shark Muzzle Brake
The Black Shark Edition features a custom 4-inch steel Shark muzzle brake designed to reduce muzzle movement while adding a distinctive appearance to your AR-15 build.
With a 5/8x24 thread pattern, the muzzle device is compatible with common .300 Blackout accessories and muzzle configurations.
M-LOK Free-Float Handguard
The 12-inch slim profile M-LOK handguard provides a lightweight mounting platform for:
- Weapon lights
- Hand stops
- Grips
- Bipods
- Other compatible accessories
The free-float design helps improve consistency by reducing contact with the barrel.
Mil-Spec AR-15 Compatibility
The A3 flat top upper receiver is manufactured from 7075-T6 forged aluminum and hardcoat anodized for durability. Forward assist and dust cover are installed for a complete upper receiver setup.
Designed to work with most standard AR-15 lower receivers.
Perfect For
The 16 Inch 300 Blackout Upper is ideal for:
- AR-15 300 BLK conversions
- Recreational shooting
- Range use
- Hunting applications where permitted
- Custom AR-15 builds
- Shooters looking for a unique Shark muzzle brake configuration
- Builders wanting a versatile .300 Blackout platform
Frequently Asked Questions
Will this 16 inch 300 Blackout upper fit my AR-15 lower?
Yes. This upper assembly is designed to fit most standard mil-spec AR-15 lower receivers.
Can I use standard AR-15 magazines with this upper?
Yes. .300 AAC Blackout is designed to function with standard AR-15 magazines. Many shooters dedicate magazines to specific calibers to prevent ammunition mix-ups.
Does this upper include a bolt carrier group?
No. The BCG and charging handle are not included but can be purchased separately.
Can I shoot both subsonic and supersonic ammunition?
Yes. The .300 AAC Blackout cartridge was designed to function with both ammunition types. Performance depends on ammunition selection and overall firearm configuration.
Is this 300 Blackout upper suppressor compatible?
The 5/8x24 threaded barrel accepts compatible muzzle devices and suppressors where legally permitted.
What makes the Black Shark Edition different?
The Black Shark Edition features a custom steel Shark muzzle brake, giving the upper a distinctive appearance while providing additional muzzle control compared to a standard muzzle device.
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Tags: 300 Blackout Upper, 300 AAC Blackout, 300 BLK, 16 Inch Upper, 16 Inch 300 Blackout Upper, AR-15 Upper Assembly, Complete AR-15 Upper, Black Shark Upper, Shark Muzzle Brake, M-LOK Upper, Free Float Handguard, Medium Profile Barrel, Nitride Barrel, 4150 CMV Barrel, 5/8x24 Threaded Barrel, AR-15 Build, 300 Blackout Rifle Build, Hunting Upper, Range Upper, Suppressor Ready, Moriarti Armaments