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"
August 2026 on GunPartPicker
Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Government Carbine - 11.5" ranked #51 of the 298 barrels builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #56 of the 815 barrels builders have added. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and mostly AR-15 (67%, then AR-10 33%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 8 retailers we track have it in stock. The best price drifted down from $143.10 to $99.99 over August 2026 without a real sale. Buying today, the lowest price is $122.49 at Ammunition Depot, above August's low of $99.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 27 builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Upper Receiver$129 · out of stockin 7 builds
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
Bolt Carrier Group$149 · out of stockin 5 builds
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Charging Handle$69 · out of stockin 5 builds
Midwest Industries 10.5 Lightweight Handguard Black M-LOK
Handguard$180in 2 builds
Aero Precision M4E1 Stripped AR-15 Lower Receiver - Black
Lower Receiver$113 · out of stockin 3 builds
Wilson Combat AR-15 Lo-Profile Gas Block .750" Black
Gas Block$33in 6 builds
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%
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 | $1337.77 |
 | 23 | $1955.18 |
 | 12 | $5415.67 |
 | 10 | $967.79 |
 | 30 | $3896.98 |
 | 22 | $962.83 |
 | 9 | $1410.43 |
| 12 | $2268.30 |
 | 10 | $1099.47 |
| 13 | $1143.87 |
 | 9 | $882.02 |
Customer reviews
5.0out of 5
1 global rating
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