Radian Weapons AX556 — Billet Upper/Lower Receiver Set with 14" M-LOK Handguard, Ambidextrous Controls, 5.56 NATO/.223 Rem, Cerakote Black (R0411 | UPC 817093023942)

Precision machining. True ambidexterity. Duty-tough finish. The Radian Weapons AX556 delivers a premium billet upper/lower receiver set engineered for serious shooters building a top-tier 5.56 NATO/.223 Rem rifle. With Radian’s hallmark fully ambidextrous controls, a lightweight 14-inch M-LOK® handguard, and an included Radian Talon™ ambidextrous safety and hammer pin, this matched set is the foundation for a rifle that runs fast, smooth, and reliably in any role—from defensive carbine to competition blaster.

Why Choose the Radian AX556 Receiver Set

• Billet-Machined Precision: Upper and lower receivers are cut from quality billet for tight tolerances, superior fitment, and a rigid, consistent platform that resists flex under heat and hard use.

• True Ambidextrous Operation: Purpose-built for left- and right-handed shooters—magazine release, bolt catch/release, and safety manipulation can be accessed from either side, supporting shoulder transitions and unconventional positions.

• 14" M-LOK Handguard (Included): Sleek, free-float aluminum handguard with M-LOK at 3/6/9 o’clock and a continuous top rail for optics, BUIS, lasers, and lights—keeping weight down and barrel free of contact for enhanced accuracy potential.

• Battle-Proven Cerakote® Finish: Black Cerakote provides a durable, corrosion-resistant coating that shrugs off sweat, rain, dust, and range rash while maintaining a professional, low-glare appearance.

• Radian Talon™ Safety (Included): The industry-favorite ambi safety with modular 45°/90° throw* delivers crisp, tactile engagement and consistent indexing from either hand.

• Drop-In Compatibility: Designed for 5.56 NATO/.223 Rem builds using standard AR-15 pattern internals and components (barrel, BCG, charging handle, buffer system, etc.).

• Matched Upper/Lower: Precision alignment helps with consistent zero retention and smooth cycling when paired with quality parts and correct torque values.

*Verify your chosen throw angle with your fire control group for proper engagement.

Performance & Ergonomics That Matter

• Faster Manipulations: Ambi bolt and magazine controls reduce time-wasting hand swaps and keep the rifle shouldered during reloads and malfunction clearances.

• Stable Sight Picture: Free-float handguard helps maintain point of impact when using barricade rests or accessories.

• Modularity Without Bulk: Multiple M-LOK positions support mission-specific setups (light, sling QD, hand stop, bipod) without the weight of legacy quad rails.

• Consistent Controls: Radian’s geometry and control placement promote repeatable grip and thumb placement, crucial for speed and safety under stress.

Ideal Use Cases

• Defensive & Professional Duty Carbines: Ambi control layout supports shoulder transitions and off-hand manipulation in tight spaces.

• 3-Gun & Practical Competition: Faster reloads and intuitive control placement shave seconds when it counts.

• Training & Skill Development: Ambidextrous design lets shooters build proficiency on both shoulders and adapt to positional shooting.

• Premium Enthusiast Builds: Showcase-quality billet machining and Cerakote with real performance benefits.

Key Features & Specifications (At a Glance)

• Model: Radian Weapons AX556

• Type: Billet upper & lower receiver set, semi-automatic

• Caliber Pattern: 5.56 NATO / .223 Remington (AR-15 standard)

• Handguard: 14" free-float M-LOK with full-length top rail

• Controls: Fully ambidextrous bolt catch/release, mag release; includes Radian Talon™ ambidextrous safety

• Included Hardware: Hammer pin (and safety as noted)

• Material: Billet aluminum receivers; aluminum handguard

• Finish: Cerakote® Black (low-glare, corrosion-resistant)

• SKU / MPN: R0411

• UPC: 817093023942

Note: Barrel, gas system, BCG, charging handle, buffer assembly, small parts, and sights/optics are not included unless specified by your retailer. Always confirm the complete parts list at point of sale.

Compatibility Notes

• AR-15 Standard Parts: Accepts AR-15 pattern 5.56/.223 components. Ensure gas system length, barrel nut, and muzzle device thread pitch match your chosen parts.

• Triggers & FCG: Works with most mil-spec and premium triggers; verify safety throw angle (45°/90°) compatibility with your trigger.

• Handguard Accessories: M-LOK certified; use M-LOK hardware for secure, repeatable mounting.

• Magazines: Uses standard AR-15 5.56/.223 magazines from leading brands.

Setup Tips (High-Level, Non-Gunsmithing)

• Torque & Specs: Follow manufacturer torque and thread-locker guidance for barrel nut and handguard fasteners.

• Gas & Buffer Tuning: Choose an appropriate gas system length and buffer weight to match barrel length and intended ammo—reliable cycling starts with a balanced system.

• Optics & Sights: The continuous top rail supports LPVOs, red dots, and BUIS; maintain proper eye relief and mount height for your use case.

• Ergonomics: Consider a QD sling mount, hand stop, or light/pressure pad placements that complement your grip and control layout.

Frequently Asked Questions

Is this a complete rifle?
No. This is a receiver set with handguard and select controls/hardware. You’ll supply the remaining AR-15 parts to complete your build in accordance with all laws.

Is it truly ambidextrous?
Yes. The AX556 platform provides ambi mag release and ambi bolt catch/release, and this package includes the Radian Talon ambi safety.

Will it work with my preferred trigger?
The AX556 is compatible with most AR-15 triggers. Confirm safety throw angle compatibility (45° or 90°) with your specific FCG.

What length barrels pair well with the 14" handguard?
Common choices range from 14.5" (pinned/welded where legal) to 16" and 18". Ensure adequate gas block clearance and intended accessory placement.

What finish is used?
Cerakote Black, selected for durability, abrasion resistance, and low-glare signature.

SEO Highlights (Naturally Integrated)

Radian Weapons AX556 billet receiver set, ambidextrous AR-15 upper/lower, 5.56 NATO / .223 Rem compatible, 14" M-LOK free-float handguard, Cerakote Black, includes Radian Talon ambidextrous safety and hammer pin, premium AR build foundation, R0411, UPC 817093023942.

Compliance & Responsible Ownership

Always comply with federal, state, and local laws regarding firearm parts and assembly. Some components may be legally regulated in your jurisdiction. Perform all work safely or consult a qualified armorer. Practice strict firearm safety at every step.

Radian Weapons AX556 — Billet precision, true ambi control, and a mission-ready 14" M-LOK rail. Start your premium 5.56/.223 build with a foundation trusted by serious shooters.

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