Spike's Stripped Lower(calico Jack)

The Spike's Stripped Lower (Calico Jack) is the foundation component every AR-platform builder needs when assembling a custom rifle from the ground up. As a federally regulated firearm component, this stripped lower receiver serves law enforcement, military personnel, competitive shooters, and civilian builders who demand precision engineering and aesthetic distinction. The Calico Jack design—featuring Spike's signature pirate skull and crossbones motif—delivers professional-grade functionality without sacrificing visual identity, making it ideal for operators who want their equipment to reflect their personality.

Manufactured to exacting tolerances, the Spike's Stripped Lower is forged from high-strength aluminum alloy and finished with a hard-anodized coating that resists corrosion and wear in demanding environments. This receiver houses the fire control group, hammer, trigger, and selector mechanism—all critical to safe, reliable operation. The stripped configuration means it arrives without these internal components, allowing builders to customize trigger pull weight, safety features, and firing characteristics to match mission requirements or personal preference. Spike's commitment to precision machining ensures zero tolerance stack-up and proper indexing with upper receivers and buttstock hardware.

This lower receiver is compatible with all mil-spec AR-15 upper assemblies, furniture, and internal components, giving builders virtually unlimited customization options for duty, training, or sport shooting applications. Installation requires only basic gunsmith knowledge and hand tools—the receiver accepts standard trigger groups, buffer tubes, and grip panels available from hundreds of manufacturers. Whether you're building a precision rifle, home defense system, or competition platform, the Spike's Stripped Lower (Calico Jack) provides the authentic, battle-tested foundation professional operators trust for mission-critical performance.