The Shield Arms Stripped Billet Lower Receiver (model SA-15-SLU) is engineered for shooters who demand precision, durability, and modularity. Crafted from a premium 7075‑T6 aluminum billet, this lower receiver is CNC‑machined to exacting tolerances, ensuring a perfect fit for both 5.56×45 mm NATO and 300 Blackout (300 BLK) platforms. Paired with the integrated folding adapter, the SA‑15‑SLU provides a seamless solution for tactical and recreational builds.

Key Features & Benefits

• Universal Compatibility: Fully compatible with standard AR‑15 uppers, allowing effortless swaps between 5.56 and 300 BLK configurations.
• Folding Adapter Design: Innovative SA‑15‑SLU folding adapter reduces overall length for compact carry without compromising reliability.
• Premium Billet Construction: 7075‑T6 aluminum billet delivers superior strength-to-weight ratio and resistance to wear.
• CNC Machined Precision: Tight tolerances guarantee smooth operation of the fire control group and flawless trigger pull.
• Stripped Configuration: Comes without a trigger group, safety selector, or buffer tube, giving builders full customization freedom.
• Enhanced Ergonomics: Optimized grip angle and magazine well geometry improve handling and reloading speed.
• Ready for Tactical Modifications: Pre‑drilled and tapped holes for accessory attachments, including rail systems, lights, and lasers.
• Corrosion‑Resistant Finish: Anodized coating protects against the elements and extends service life.

Technical Specifications

Why Choose Shield Arms?

Shield Arms has built a reputation for delivering high‑quality firearm components that meet the rigorous demands of both professional operators and hobbyist builders. The SA‑15‑SLU lower receiver embodies the brand’s commitment to:

• Precision engineering with state‑of‑the‑art CNC technology.
• Superior material selection for longevity and performance.
• Customer‑focused design that simplifies the build process.
• Extensive testing to ensure safety and reliability in all conditions.

Installation & Compatibility Tips

1. Verify that your upper receiver matches the 5.56 or 300 BLK chambering you intend to use.
2. Install the folding adapter into the stripped lower receiver according to the included alignment pins.
3. Attach your chosen buffer tube, spring, and buffer to complete the recoil system.
4. Mount a compatible trigger group and safety selector, then perform a function test.
5. Secure the lower to the upper using standard AR‑15 takedown pins and verify proper alignment.
6. Adjust the folding adapter to your preferred length for optimal balance and handling.

Ideal Applications

The SA‑15‑SLU is perfect for a wide range of scenarios, including:

• Home defense and tactical home protection.
• Law enforcement and security detail configurations.
• Competitive shooting and tactical sport events.
• Backpacking and lightweight hunting setups where compact storage is essential.
• Custom rifle builds for enthusiasts seeking a high‑performance foundation.

Customer Support & Warranty

Shield Arms offers a limited lifetime warranty on all billet lower receivers against manufacturing defects. Our dedicated support team is available to assist with technical questions, installation guidance, and parts compatibility.

SA-15-SLU

SA-15-SLU

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