Description
The Radian Weapons AX556 Stripped Billet Lower is a premium, fully ambidextrous foundation for building a high-performance AR-15 rifle. Machined from 7075-T6 aluminum, it accepts standard 223 Rem/5.56mm NATO uppers and features integrated ambidextrous controls, offering a significant ergonomic upgrade for right or left-handed shooters building a custom rifle from the ground up. This stripped lower receiver is the starting point for a build where control and precision under pressure are non-negotiable.
Key Features
- Fully Ambidextrous Design: Integrated ambi bolt catch, magazine release, and selector.
- 7075-T6 Aluminum Billet Construction: Superior strength and durability from a solid block of aircraft-grade aluminum.
- Stripped Lower Receiver: Allows for complete customization of your trigger, grip, and stock.
- Enhanced Flared Magazine Well: For faster, more reliable reloads when seconds count.
- Threaded Takedown Pin Detents: Simplifies assembly and prevents lost springs.
- Mil-Spec Compatible: Works with the vast majority of standard AR-15 upper receivers and parts kits.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 223 Remington / 5.56x45mm NATO |
| Material | 7075-T6 Aluminum Billet | Finish | Type III Hardcoat Anodized, Black |
| Controls | Fully Ambidextrous (Bolt Catch, Mag Release, Safety) |
| Compatibility | Standard AR-15/Mil-Spec Upper Receivers & Parts |
| Weight | Approximately 8.8 oz (stripped) |
Who It’s For
This lower is for the shooter who demands a tangible advantage. When it comes to home defense or dynamic shooting, having controls that work identically from either shoulder is a real force multiplier. It’s for the builder who won’t compromise on a critical component, understanding that the lower is the literal foundation of the rifle. At $391.50, it’s an investment in a platform built for serious use, not just the range. It pairs perfectly with precision uppers from brands like BCM or Aero Precision for a top-tier build. This is a tool for those who train with purpose and need their equipment to keep up.
Pros & Cons
Pros: Unmatched ambidextrous functionality right out of the box; exceptional billet strength and machining quality; thoughtful design details like the flared magwell and threaded pins enhance real-world use; provides a legitimate tactical edge for any shooter.
Cons: Premium price point compared to forged lowers; the stripped format requires additional parts and assembly knowledge; its advanced features might be overkill for a simple plinking rifle.
Frequently Asked Questions
Q: Is this a complete lower receiver?
A: No, this is a stripped lower receiver. It requires the installation of a lower parts kit (LPK), buffer tube assembly, stock, and pistol grip to become a functional firearm. An FFL transfer is required for firearm purchases of this item.
Q: Will my existing AR-15 upper fit on this lower?
A: Yes, absolutely. The Radian AX556 is designed to be mil-spec compatible, meaning it will mate seamlessly with the vast majority of standard AR-15 upper receivers on the market from brands like Palmetto State Armory, Colt, or Daniel Defense.
Q: Is it truly left-handed friendly?
A: Completely. The ambidextrous controls are not add-ons but machined directly into the billet. The magazine release, bolt catch, and safety selector are fully operational from either side with identical leverage and feel—no gunsmithing required.
Ready to build your next rifle on the most capable foundation available? This Radian Weapons AX556 Stripped Billet Lower is available at firearms-missouri.com for Missouri residents and nationwide.
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