Rosco Bloodline 8.2" .300 Blackout Barrel
Compact 8.2" Bloodline .300 Blackout barrel with 4150 CMV construction, nitride finish, pistol gas, and 5/8x24 threads.
- Price
- $146
- Brand
- Rosco Manufacturing
- Category
- Barrels
Featured in
Features
- •8.2" length
- •.300 AAC Blackout
- •1:7 twist rate
- •Pistol-length gas system
- •Melonite/QPQ finish
- •.750" gas journal
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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 Barrel 300 Blackout 8.2" Black 1:7 Heavy Profile BL-82-HB-300BLK-7-P
Price History
90-day low $138.51 · at low nowMore AR-15 guides & articles
Guides
Overview
The Rosco Bloodline 8.2" .300 Blackout barrel is a compact value barrel built from 4150 Chrome Moly Vanadium steel with a nitride finish that provides corrosion resistance and bore durability. The specs are straightforward: 8.2-inch length, pistol-length gas, 1:7 twist, .750 gas journal, and 5/8x24 muzzle threads.
At 8.2 inches, this barrel stays compact while preserving enough dwell time for a practical suppressed .300 Blackout pistol or SBR. The 1:7 twist rate stabilizes everything from 110gr supersonic hunting loads to 220gr subsonic match rounds. Made entirely in the USA, the Bloodline series represents the kind of value that makes quality .300BLK builds possible on a budget without meaningful compromises.
Key Features
- 8.2" compact barrel length for suppressed .300 Blackout pistol/SBR builds
- 4150 Chrome Moly Vanadium steel with melonite/QPQ finish
- 1:7 twist rate stabilizes 110-220 grain projectiles
- Pistol-length gas system for compact .300BLK builds
- .750" gas journal accepts standard gas blocks
- 5/8x24 muzzle threads for .30 caliber devices and suppressors
Pros
- +Strong value pricing for 4150 CMV with melonite finish
- +Compact 8.2" length keeps suppressed builds short
- +Made in USA with consistent quality control
- +Melonite finish provides excellent corrosion and wear resistance
- +Simple short .300BLK barrel specs for pistol/SBR builds
Cons
- −Less brand recognition than Ballistic Advantage or Faxon
- −Limited barrel profile options in the Bloodline series
- −Pistol-length gas system still benefits from adjustable block with some loads
- −Requires SBR paperwork or pistol configuration
Detailed Specifications
- lengths
- 8.2"
- chamber
- .300 AAC Blackout
- Material
- 4150 Chrome Moly Vanadium steel
- Finish
- Melonite/QPQ nitride
- twist
- 1:7
- grooves
- 6 groove rifling
- gasSystem
- Pistol-length
- gasJournal
- .750"
- muzzleThreads
- 5/8x24 TPI
- profile
- Heavy per BL-82-HB-300BLK-7-P feed title
- weight
- Approximately 1.25 lbs
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Build Your Custom Configuration
Add the Rosco Bloodline 8.2" .300 Blackout Barrel to your build and see how it enhances your platform.