Radical Firearms 8.5" 300 Blackout 1:7 Pistol Length Barreled Upper - 7" MHR Handguard
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Radical Firearms
Overview
The Radical Firearms 8.5" 300 Blackout Upper Receiver is a complete assembly designed for AR-15 platforms, featuring an 8.5-inch barrel that effectively balances maneuverability and performance. With a 1:7 twist rate, this upper is optimized for stabilizing heavier projectiles, making it ideal for a variety of ammunition choices in the 300 Blackout caliber. Commonly found in short-barreled builds, this upper is particularly suited for compact configurations that prioritize stealth and versatility in close-quarters engagements.
Specifications
Radical Firearms 8.5" 300 Blackout 1:7 Pistol Length Barreled Upper - 7" MHR Handguard
Available Merchants
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Build history on GunPartPicker
Builders have been adding the Radical Firearms 8.5" 300 Blackout 1:7 Pistol Length Barreled Upper - 7" MHR Handguard to their builds on GunPartPicker since March 2026. All time, it ranks #659 of the 1,714 upper receivers builders have added.
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