O
orkaydk299best buy yet
Reviewed on February 15, 2026Verified with Build
accuracy is great
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Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine - 11.5"
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Rosco Manufacturing
Overview
The Rosco Manufacturing Bloodline 5.56 AR-15 Barrel is an 11.5" M4 profile barrel designed for optimal performance with 5.56 NATO ammunition. Its carbine-length gas system ensures reliable cycling and function, while the 1:7 twist rate stabilizes a wide range of bullet weights, making it suitable for various applications. This barrel is commonly found in builds focused on compact configurations, particularly those intended for close-quarters engagements.
Specifications
MPNBL-115-M4-556-7-C
Thread Pitch1/2x28
PlatformAR-15
ColorBlack
Action TypeSemi-Auto
ComplianceStandard
Barrel Length11.5
Gas System LengthCarbine
Barrel ProfileM4
Caliber5.56 NATO
Twist Rate1:7
CoatingQPQ/Nitride
Gas Block Diameter.750
Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine - 11.5"
Frequently Built With
Based on build data
Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Yankee Hill Machine Co., Inc. Ar-15 Gas Tube Black Carbine
Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers
Bravo Company M16 Bolt Carrier Group Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
66.7%
AR-1566.7%
AR-1033.3%
CaliberBased on real build data showing which calibers builders choose alongside this product.
100%
5.56 NATO100%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
100%
Carbine100%
| Product | Category | Times Built Together |
|---|---|---|
| Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension | 7 | |
| Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4 | 7 | |
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | 6 | |
| Yankee Hill Machine Co., Inc. Ar-15 Gas Tube Black Carbine | 6 | |
| Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers | 5 | |
| Bravo Company M16 Bolt Carrier Group Black | 5 |
| Platform | Percentage |
|---|---|
| AR-15 | 66.7% |
| AR-10 | 33.3% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 100% |
| Gas System | Percentage |
|---|---|
| Carbine | 100% |
Builds Featuring This Part
See all 11 →Builds in the community that include the Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine - 11.5"
| Build | Parts | Total |
|---|---|---|
 | 16 | $1310.01 |
 | 23 | $2088.15 |
 | 12 | $5602.90 |
 | 10 | $988.75 |
 | 30 | $2809.85 |
 | 22 | $968.15 |
 | 9 | $1399.45 |
| 12 | $2248.92 |
 | 10 | $1134.36 |
| 13 | $1102.82 |
 | 9 | $874.57 |
Customer reviews
5.0out of 5
1 global rating