Radical Firearms RF-15 Lower Receiver – Multi-Cal, 300 Blackout

The Radical Firearms RF-15 lower receiver provides a solid, ready-to-use foundation for your next AR-15 style rifle or pistol build. Chambered as multi-caliber and tagged for 300 Blackout, this receiver is built to handle a variety of AR-compatible calibers, giving builders maximum flexibility.

Equipped with a mil-spec fire control group, safety selector, and polymer grip, this RF-15 lower is ready to pair with the upper receiver of your choice. Precision-machined from durable aluminum and finished in matte black, it’s designed to provide long-term reliability whether for range use, hunting, or personal defense builds.

Radical Firearms is known for delivering American-made, high-value AR components, and this RF-15 lower is no exception—perfect for both first-time builders and seasoned enthusiasts.

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