Radian Weapons AX556 – Billet Upper/Lower Receiver Set, 5.56 NATO / .223 Rem, Fully Ambidextrous, 15.5" M-LOK® Handguard, Cerakote® FDE (R0406)

Model/SKU: R0406 • UPC: 817093022600
Caliber Platform: 5.56 NATO / .223 Remington • Configuration: Billet upper & AX556 lower receiver set (semi-automatic AR-15 pattern) • Controls: Fully ambidextrous • Handguard: 15.5" free-float M-LOK® • Finish: Cerakote® Flat Dark Earth (FDE) • Includes: Radian Talon™ ambidextrous safety, hammer pin

Step up to a premium foundation for your next AR-15 build with the Radian Weapons AX556 billet upper/lower set (R0406). Machined to exacting tolerances and finished in rugged Cerakote® FDE, this receiver set pairs Radian’s flagship AX556 lower—renowned for its fully ambidextrous control layout—with a precision billet upper and a slim, rigid 15.5" free-float M-LOK® handguard. The result is a rock-solid, optics-ready chassis that runs fast for right- or left-handed shooters, keeps point-of-impact consistent, and looks as good as it performs. To jump-start your lower build, Radian includes the Talon™ 45/90 ambi safety selector and a hammer pin, streamlining assembly without compromising quality.

Why Builders Choose the AX556 Receiver Set

• True ambidextrous ergonomics: Mirrored bolt catch/release and mag release functions plus the included Talon™ ambidextrous safety give you identical, efficient controls from either shoulder—perfect for barricades, positional shooting, or duty use.

• Billet precision & strength: 7075-T6 billet upper and lower deliver tighter mating surfaces, excellent rigidity, and a refined feel that enhances accuracy potential.

• 15.5" free-float M-LOK® rail: Extended handguard length maximizes sight radius and accessory placement (lights, QD cups, bipods, grips, IR/laser) while keeping the barrel free-floating for consistent POI.

• Enhanced build details: Flared magwell for faster reloads, integral trigger guard, and clean, de-horned lines that won’t snag gear.

• Cerakote® FDE durability: Low-glare, solvent- and abrasion-resistant finish that blends seamlessly with FDE or black furniture and duty accessories.

• Ready for premium parts: Precise spec ensures smooth integration with quality barrels, BCGs, triggers, and buffer systems in 5.56 NATO / .223 Rem builds.

Key Features at a Glance

• Receiver Set: AX556 billet lower + billet upper (AR-15 pattern)

• Controls: Fully ambidextrous (mag release, bolt catch/release) + Talon™ ambi safety included

• Handguard: 15.5" free-float M-LOK® with continuous 12 o’clock Picatinny for optics/BUIS

• Compatibility: Standard 5.56 NATO / .223 Rem AR-15 components (barrels, BCGs, triggers, buffer systems)

• Finish/Color: Cerakote® Flat Dark Earth (FDE)

• Included Hardware: Radian Talon™ ambi safety, hammer pin

• Model / UPC: R0406 / 817093022600

Build Ideas & Use Cases

• Hard-use duty rifle: Ambidextrous controls speed manipulations around vehicles and cover; long rail supports white light + IR + sling exactly where you need them.

• Competition carbine: Flared magwell, long sight radius, and rigid free-float rail aid fast stages and consistent tracking.

• Suppressed general-purpose build: Extended rail provides room for can-clearance grips and cable management while maintaining balance.

• Training & home defense: Mirror-image controls simplify teaching new shooters and transitioning shoulders around doorways and barricades.

Assembly Tips (Pro Builder Notes)

1. Torque & alignment: Follow barrel nut and muzzle device torque specs; verify gas block alignment to prevent short-stroking.

2. Trigger selection: A crisp single-stage or two-stage match trigger pairs well with the AX556’s rigid geometry—use quality pins and proper torque.

3. Buffer tuning: Choose a buffer/spring matched to your barrel length, gas system, and muzzle device to optimize recoil impulse.

4. Cable management: Use M-LOK® covers/channels to keep light/laser leads tidy along the 3/9 o’clock faces of the rail.

Specifications (Summary)

• Brand: Radian Weapons

• Product: AX556 Billet Upper/Lower Set with 15.5" M-LOK® Handguard

• Model/SKU: R0406

• UPC: 817093022600

• Platform: AR-15, semi-automatic

• Caliber Compatibility: 5.56 NATO / .223 Rem (receiver set/handguard—use compatible barrel/BCG)

• Receivers: 7075-T6 billet upper & AX556 lower, fully ambidextrous control layout

• Handguard: 15.5" free-float M-LOK® with continuous top Picatinny

• Finish: Cerakote® Flat Dark Earth (FDE)

• Included: Radian Talon™ ambidextrous safety, hammer pin

• Magwell: Flared; trigger guard: integral

• Intended Use: Premium foundation for duty, competition, training, and GP builds

SEO Highlights (What Shoppers Search)

• Radian AX556 billet ambidextrous lower/upper set R0406

• 15.5" M-LOK handguard Cerakote FDE receiver set

• Radian Talon ambi safety included 817093022600

• AR-15 5.56/.223 ambidextrous receiver set

• Premium billet AR receiver with flared magwell

Meta Title (SEO)

Radian AX556 Billet Upper/Lower Set – Fully Ambidextrous, 15.5" M-LOK® Handguard, Cerakote® FDE | R0406 | 817093022600

Meta Description (SEO)

Build a better AR-15 with the Radian AX556 billet upper/lower set. Fully ambidextrous controls, 15.5" free-float M-LOK® handguard, Cerakote® FDE, and the Radian Talon™ ambi safety included. Model R0406, UPC 817093022600.

Structured Data (JSON-LD)

json
Copy code
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Radian AX556 Billet Upper/Lower Set with 15.5\" M-LOK Handguard",
  "sku": "R0406",
  "gtin12": "817093022600",
  "brand": { "@type": "Brand", "name": "Radian Weapons" },
  "category": "SportingGoods",
  "description": "Premium AR-15 receiver set featuring the Radian AX556 fully ambidextrous lower, billet upper, 15.5-inch free-float M-LOK handguard, and Cerakote Flat Dark Earth finish. Includes Radian Talon ambidextrous safety and hammer pin.",
  "material": "7075-T6 aluminum (receivers/handguard), steel hardware, Cerakote finish",
  "color": "Flat Dark Earth",
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "Controls", "value": "Fully ambidextrous (mag release, bolt catch/release) + Talon safety" },
    { "@type": "PropertyValue", "name": "Handguard", "value": "15.5 in free-float M-LOK" },
    { "@type": "PropertyValue", "name": "Platform", "value": "AR-15 (5.56 NATO/.223 Rem compatible)" }
  ],
  "itemCondition": "https://schema.org/NewCondition"
}

**Ambi speed, billet rigidity, and FDE durability—**the Radian AX556 (R0406) gives your 5.56/.223 build the premium foundation it deserves, right out of the box. The End