Spikes ST15 Calico Jack AR-15 Multi-Caliber Stripped Lower - Black Hardcoat Anodized

The Spikes ST15 Calico Jack is a stripped AR-15 lower receiver forged from 7075-T6 aluminum and finished in a rugged black hardcoat anodized coating. Stamped with the signature Calico Jack pirate logo, this multi-caliber lower gives builders a clean foundation for a custom AR-platform project and accepts common AR calibers such as 5.56 NATO.

Designed as a true stripped lower, the STLS016 ships without a trigger group or other internal small parts, leaving component selection entirely up to the builder. The receiver is configured as a low shelf lower and is RDIAS compatible for those running registered drop-in auto sear setups where legally permitted.

Constructed from 7075-T6 forged aluminum and protected by a black hardcoat anodized finish, the Calico Jack lower delivers the strength and corrosion resistance expected of a duty-grade AR receiver. Whether you are assembling a lightweight carbine, a pistol-caliber build, or a precision rifle, this stripped lower provides the durable backbone your build needs.

DISCLAIMER: Firearms and receivers are subject to state-specific shipping restrictions and must be transferred through a valid FFL dealer. Please visit our shipping restrictions page to review all applicable restrictions for your state. Subject to change.