Rosco Manufacturing Bloodline 300 Blackout AR-15 Barrel Heavy Pistol - 10.5"
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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.
Specifications
Rosco Manufacturing Bloodline 300 Blackout AR-15 Barrel Heavy Pistol - 10.5"
Build history on GunPartPicker
Builders on GunPartPicker first added the Rosco Manufacturing Bloodline 300 Blackout AR-15 Barrel Heavy Pistol - 10.5" to a build in February 2026. Builds with this barrel are nearly all chambered in 300 Blackout, nearly all on pistol-length gas, and mostly AR-15 (83%, then AR-10 17%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, but today 3 of the 7 retailers we track have it in stock. Prices barely moved in August 2026, holding around $120.99, so there haven't been real sales lately. Buying today, the lowest price is $120.99 at Ammunition Depot, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 10+ retailers
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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.
Builds Featuring This Part
See all 2 →Builds in the community that include the Rosco Manufacturing Bloodline 300 Blackout Ar-15 Barrel Heavy Pistol - 10.5"
| Build | Parts | Total |
|---|---|---|
 | 18 | $1772.11 |
 | 31 | $2997.56 |
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