Rosco Bloodline 16″ 300 Blackout Barrel



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SKU: BL-16-HB-300BLK-8-P Categories: , , Tags: , , , , , ,

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Rosco Bloodline 16″ 300 Blackout Barrel

The Rosco Bloodline 16″ 300 Blackout barrel was created with input from SOCOM end users and the Advanced Armament Corporation.  The Rosco Bloodline 16″ 300 Blackout barrel is designed to extract the full potential of the 300 Blackout caliber with supersonic ammunition.  Rosco took into account the twist-rate, gas port diameter, and barrel length to bring you a high performance, optimally balanced barrel for your next custom AR build.

Bloodline series barrels are Rosco’s hardest working barrel.  No matter if you’re a hobbyist, tactical shooter, or Law Enforcement Officer, Rosco has a barrel that will fit your needs.  All of the Bloodline barrels are made from scratch in their Rhode Island facility from a blank piece of steel.  The Rosco Manufacturing Bloodline 16″ 300 Blackout barrel is machined from 4150 CMV steel, a 1:8 twist, featuring an 11 degree crown, .750 gas block diameter, pistol length gas, and finished in Black Nitride.

Arm or Ally is proud to add Rosco Manufacturing to our wide selection of AR Barrels from Ballistic Advantage and Faxon.  If you just starting to build your own custom rifle, see our our growing selection of AR parts, to include receivers, bolt carrier groups, muzzle devices, and more in our AR parts department. Are you a reloader, or considering becoming one? We offer a large selection of bullets and brass to choose from.

Product Information

Manufacturer: Rosco Manufacturing
Series: Bloodline
Profile: Heavy
Part #: BL-16-HB-300BLK-8-P
Caliber: 300 Blackout
Length: 16″
Material: 4150 CMV
Finish: Black Nitride
Gas System Length: Pistol Length
Gas Block Diameter: .750″
Twist Rate: 1:8 inches
Muzzle: 5/8 x 24 threaded
Weight: 30.01 oz
MSRP: $175.00

Weight 33 oz
Dimensions 17 × 3 × 2 in
Barrel Finish

QPQ Nitride

Gas Block Diameter


Gas System


Muzzle Thread

5/8 x 24

Barrel Length



300 Blackout


Rosco Manufacturing


4150 Chrome Moly Vanadium

Part Type

Barrel, Upper Receiver Parts





Twist Rate


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