Rosco Manufacturing Purebred 300 Blackout AR-15 Barrel Heavy Pistol - 10.5"
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Rosco Manufacturing
Overview
The Rosco Manufacturing Purebred 300 Blackout AR-15 Barrel features a 10.5-inch heavy profile designed for enhanced accuracy and stability, particularly suited for short-barreled builds. With a pistol-length gas system and a 1:7 twist rate, this barrel effectively stabilizes a variety of bullet weights, ensuring reliable performance with the 300 Blackout caliber. This barrel is commonly found in pistol builds, where compactness and maneuverability are key considerations.
Specifications
Rosco Manufacturing Purebred 300 Blackout AR-15 Barrel Heavy Pistol - 10.5"
August 2026 on GunPartPicker
Rosco Manufacturing Purebred 300 Blackout AR-15 Barrel Heavy Pistol - 10.5" 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 #237 of the 812 barrels builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 3 of the 5 retailers we track have it in stock. It dipped to $113.48 at Optics Planet for a stretch in August 2026, well under its usual $146 to $157.50, so sales do come around. Buying today, the lowest price is $113.48 at Optics Planet, which matches the best price we saw in August.
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 6 builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Spikes Tactical Upper/Lower Receiver .223 Remington AR Lower, Flat Dark Earth - STS1512
Daniel Defense MFR XL Free Float AR-15 Handguard - M-LOK - 9"
Breek Arms Warhammer MOD2 Micro Latch AR-15 Ambidextrous Charging Handle - FDE
Strike Industries AR-15 Gas Tube - Pistol Length
Strike Industries Enhanced Ultimate Dust Cover - Flag - Flat Dark Earth
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 1 →Builds in the community that include the Rosco Manufacturing Purebred 300 Blackout Ar-15 Barrel Heavy Pistol - 10.5"
| Build | Parts | Total |
|---|---|---|
 | 9 | $576.81 |
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