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Rosco Manufacturing
Overview
The Rosco Manufacturing Bloodline 9mm AR-15 Barrel features a medium weight design that balances stability with maneuverability, making it ideal for various applications. With a length of 5.5 inches and a blowback gas system, this barrel is optimized for reliable cycling in 9mm builds, while its 1:10 twist rate enhances bullet stability for improved accuracy. This barrel is commonly found in builds that prioritize blowback operation and 5.56 NATO caliber conversions.
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Based on build data

Wilson Combat Ar-15 Billet Upper Receiver
Upper Receiver
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Gas Block
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Gas Tube
Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock
Lower ReceiverAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 153 |
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 146 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 144 |
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | Gas Block | 136 |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | Gas Tube | 132 |
| Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock | Lower Receiver | 118 |
| Platform | Percentage |
|---|---|
| AR-15 | 88.2% |
| AR-10 | 9.1% |
| AR-9 | 2.6% |
| Caliber | Percentage |
|---|---|
| 9mm | 100% |
| Gas System | Percentage |
|---|---|
| Blowback | 100% |
Builds in the community that include the Rosco Manufacturing Bloodline 9mm Ar-15 Barrel Medium Weight - 5.5"
| Build | Parts | Total |
|---|---|---|
![]() | 14 | $912.82 |
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