Description
Rosco Manufacturing Bloodline is a 12.5 in M4 profile barrel built for 5.56 NATO and .223 REM. It uses a 1:7 barrel twist and a carbine-length gas system, and it is threaded with 1/2×28 threads. The barrel is made from 4150 CMV steel and finished in black nitride.
Key details
- Caliber: .223 REM/5.56 NATO
- Barrel twist rate: 1:7
- Thread pitch: 1/2×28
- Material: 4150 CMV
- Finish: Black nitride
- Gas system: Carbine-length
Specifications
| Part Type | Barrel |
|---|---|
| Fits | AR15 |
| Caliber | .223 REM/5.56 NATO |
| Barrel Length | 12.5 in |
| Thread Pitch | 1/2×28 |
| Twist Rate | 1:7 in |
| Profile | Government profile |
| Material | 4150 CMV |
| Finish | Black nitride |




