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Rosco Manufacturing Bloodline .300 AAC Blackout Barrel Up to 10% Off w/ Free Shipping — 3 models

Special offer available for this product. Click here to see!
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
1 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
2 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P
3 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
4 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
5 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
6 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
7 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P
8 of 8 images
Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P

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Questions & Answers
What size gas tube use onto the barrel 10.5? Expert Answer

All of these Rosco Manufacturing Bloodline .300 AAC Blackout Barrels use a pistol length gas system and require a pistol length gas tube and 0.750" gas block.

by Ethan, Gear Expert, October 24, 2022
Is the overall length of the barrel 8.2 inches? Expert Answer

The Rosco Manufacturing Bloodline .300 AAC Blackout Barrels come in 3 different lengths 8.2", 10.5", and 16".

by Hunter, Gear Expert, February 28, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Great deal from a great company by Rich, Verified Owner, March 30, 2025
What can I say that hasn’t been said, OP is one of the few companies that will deal with commie CT- customer service and prices are great, barrel is exactly as expected.
1/1 found this helpful
Helpful Positive Review
My new favorite barrel by james, Verified Owner, September 4, 2018
I recently bought the Rosco 8.2 Bloodline barrel for a 300 blackout pistol build. Barrel is very well made with no visible machine marks and quality matching some and surpassing most more expensive barrels I have used. Every dimension from gas port t...
Read More...
3/3 found this helpful
Helpful Positive Review
it just works! by squirtlocker, June 6, 2020
10.5 300 using aero enhanced upperand gas tube, bcm gas block. No issues suppressed or unsuppressed. 500 rounds no problem all factory new ammo subs and supers. About 1 moa at 100 using dot from bench. With scope maybe sub moa
1/1 found this helpful
Helpful Negative Review
Five months later. by Randy R, Verified Owner, July 6, 2020
Long story short, back in January I ordered all of the parts to build a new AR Pistol. This is 7th or 8th AR that I have built, so I'm really not all that inexperienced. I decided to go with a Rosco barrel because of the reputation for quality. When ...
Read More...
37/41 found this helpful
Most Recent Reviews
Great Barrel by Josh, Verified Owner, November 6, 2025
Great barrel with a heavy profile. Beautiful rifling and a 1:7 twist. I don't know if you could get much better at this price point.
Most Recent Reviews
great barrel by neb grendel, Verified Owner, December 5, 2024
Roscoe makes a good barrel. This is a great hard use barrel that will last a lomg time. Seems pretty accurate.
Read All 9 Reviews
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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Rosco Manufacturing Bloodline .300 AAC Blackout Barrel

This Rosco Manufacturing 300 Blackout Bloodline Barrel was designed for SBR and Pistol use in conjunction with suppressors. This is the shortest that Rosco Manufacturing will go to allow you the flexibility of a shorter Personal Defense Weapon (PDW) without sacrificing performance or ballistics.image

Rosco Manufacturing 300 Blackout barrels were created by using input from SOCOM end users and some of the original creators of this caliber. Every barrel was designed to optimize the original role for the 300 Blackout; to be suppressor friendly and accurate. It is Rosco Manufacturing goal to get you the performance that you seek out of these AR15 barrels when running sub-sonic ammo or supersonic ammo (depending on barrel length). Twist rates, gas port diameters, and lengths have all been taken into account when we set out to make these. Lets just say that Rosco Manufacturing dont like leaving things to chance.

Specifications for Rosco Manufacturing Bloodline .300 AAC Blackout Barrel:

Manufacturer: Rosco Manufacturing
Color: Black
Fabric/Material: 4150 CMV Material
Caliber: .300 AAC Blackout
Barrel Profile: Heavy
Threads per Inch: 5/8x24
Barrel Material: 4150 Chrome Moly Vanadium
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Condition: New
Gas Block Journal Size-Length: 0.75 in
Gun Type: Rifle
Country of Origin: USA
Gas System: Pistol Length

Features of Rosco Manufacturing Bloodline Barrel, Heavy Profile, .300 BLK

  • Gas Block Size .750
  • Barrel Crown 11 Degree

Package Contents:

  • Rosco Manufacturing Bloodline Barrel, Heavy Profile, .300 BLK

What firearm models does the manufacturer say Rosco Manufacturing Bloodline .300 AAC Blackout Barrel is compatible with?

The manufacturer suggests that Rosco Manufacturing Bloodline .300 AAC Blackout Barrel is compatible with AR-15

Rosco Manufacturing Bloodline .300 AAC Blackout Barrel Orderable Models

List of Orderable Models

  • Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 10.5 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-105-HB-300BLK-7-P , MPN: BL-105-HB-300BLK-7-P , UPC: 181969500128 , Code: 3FY-ATB-963GA-BL-105-HB-300BLK-7-P
  • Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 16 in, Pistol, Heavy, 1-8 Twist, 5/8x24 Thread, Nitride, Black, BL-16-HB-300BLK-8-P , MPN: BL-16-HB-300BLK-8-P , UPC: 181969500135 , Code: 3FY-ATB-963GA-BL-16-HB-300BLK-8-P
  • Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P , MPN: BL-82-HB-300BLK-7-P , Code: 3FY-ATB-963GA-BL-82-HB-300BLK-7-P

Rosco Manufacturing Bloodline .300 AAC Blackout Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P , MPN: BL-82-HB-300BLK-7-P-DEMO , Code: 3FY-ATB-963GA-BL-82-HB-300BLK-7-P-DEMO
  • USED Rosco Manufacturing Bloodline .300 AAC Blackout Barrel, 8.2 in, Pistol, Heavy, 1-7 Twist, 5/8x24 Thread, Nitride, Black, BL-82-HB-300BLK-7-P, EDEMO2, Used, Condition Fair , MPN: BL-82-HB-300BLK-7-P-EDEMO2 , Code: 3FY-ATB-963GA-BL-82-HB-300BLK-7-P-EDEMO2
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