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Rosco Manufacturing
Overview
The Rosco Manufacturing Bloodline 5.56 AR-15 Barrel features a compact 10.5-inch length with an M4 profile, optimized for maneuverability while maintaining accuracy. Designed for use with a carbine-length gas system, this barrel has a .750 gas block diameter and a 1:7 twist rate, allowing it to stabilize a variety of projectile weights effectively. This barrel is commonly found in builds that prioritize a compact form factor and 5.56 NATO caliber performance.
Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Government Carbine 10.5"
Prices checked
Builders have added the Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Government Carbine 10.5" to their builds on GunPartPicker. Since April 2026, it ranks #108 of the 1,047 barrels builders have added. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
It was in stock most times we checked in October 2026, but today only Primary Arms has it in stock. Buying today, the lowest price is $144.90 at Primary Arms, above October's low of $117.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every barrel by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
The part most often added in each category by the builds that include this one

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Builds in the community that include the Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5"
| Build | Parts | Total |
|---|---|---|
![]() | 21 | $2085.16 |
![]() | 24 | $737.26 |
![]() | 13 | $1075.40 |
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