Spikes STLS024 PHU Joker Stripped Lower Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized for AR-15

The Spikes STLS024 PHU Joker Stripped Lower Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized for AR-15 is a precision-forged platform engineered for operators who demand component-level control over their build. Manufactured from 7075-T6 aluminum—an aerospace-grade alloy—this stripped lower receiver delivers the rigidity and repeatability required for sustained accuracy across multiple caliber configurations. The black hard coat anodized finish provides consistent corrosion resistance and a professional aesthetic suitable for duty, competition, or precision work.

This multi-caliber lower features a low shelf design and RDIAS compatibility, enabling shooters to configure their rifle to exact specifications without factory constraints. The 7075-T6 aluminum construction resists flex and maintains dimensional stability under repeated firing cycles, critical for consistent trigger control and shot-to-shot performance. At 0.7 lbs, the receiver's weight profile supports balanced firearm architecture whether configured as a compact carbine or specialized platform. The PHU Joker logo identifies this as a purpose-built component for serious users who understand lower receiver selection as foundational to overall system performance.

Stripped lower receivers appeal to builders and gunsmiths seeking complete assembly control—users select their own lower parts kit, buffer assembly, and stock configuration to match their intended role, whether tactical duty, long-range precision, or intermediate-range training. This platform is appropriate for law enforcement armorer builds, military contractor outfitters, and civilian shooters who value customization and component-level quality. The multi-caliber compatibility means a single lower can support .223 Remington, 5.56 NATO, and other platform-appropriate cartridges without upper receiver changes.

Important: This is a bare receiver and requires a complete lower parts kit, buffer tube assembly, and stock or brace to function. Compliance with all federal, state, and local firearms regulations is the responsibility of the purchaser. Verify your jurisdiction's requirements before purchase and assembly.