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Rosco Manufacturing
Overview
The Rosco Manufacturing Bloodline 300 Blackout AR-15 Barrel is designed specifically for heavy pistol builds, featuring a 10.5-inch length that enhances maneuverability while maintaining accuracy. With a 1:8 twist rate, this barrel stabilizes a range of bullet weights, making it versatile for various ammunition choices within the 300 Blackout caliber. Its pistol-length gas system optimizes reliability and function in compact setups. This barrel is commonly found in builds that prioritize a short, powerful configuration, ideal for close-quarters engagements.
Based on build data

Diamondback Firearms 5.56 Ar-15 Bolt Carrier Group - Nitride
Bolt Carrier Group
Sons of Liberty Gun Works Ar-15 Gas Tube Stainless Steel Pistol
Gas Tube
TruCalibre Enhanced Billet Ar-15 Bolt Catch
Bolt Catch
Timber Creek M-LOK Enforcer Vertical Foregrip, Black - M E VFG B
Pistol Grip
Spike's Tactical .300 Blk Complete Ar-15 Upper With Front Sight Base - 16"
Upper Receiver
Geissele Automatics Llc Ar-15 Premium Buffer Tube Ddc
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Diamondback Firearms 5.56 Ar-15 Bolt Carrier Group - Nitride | Bolt Carrier Group | 2 |
| Sons of Liberty Gun Works Ar-15 Gas Tube Stainless Steel Pistol | Gas Tube | 2 |
| TruCalibre Enhanced Billet Ar-15 Bolt Catch | Bolt Catch | 2 |
| Timber Creek M-LOK Enforcer Vertical Foregrip, Black - M E VFG B | Pistol Grip | 2 |
| Spike's Tactical .300 Blk Complete Ar-15 Upper With Front Sight Base - 16" | Upper Receiver | 2 |
| Geissele Automatics Llc Ar-15 Premium Buffer Tube Ddc | 1 |
| Platform | Percentage |
|---|---|
| AR-15 | 83.3% |
| AR-10 | 16.7% |
| Caliber | Percentage |
|---|---|
| 300 Blackout | 100% |
| Gas System | Percentage |
|---|---|
| Pistol | 100% |
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