The Radian AX556 Builder Set offers precision, versatility, and premium construction, making it an excellent foundation for your next AR-15 build. Known for their innovative designs and attention to detail, Radian Weapons delivers top-tier components that exceed the demands of professional shooters and enthusiasts alike. With a brown anodized finish for a unique aesthetic and durable protection, this builder set includes a matched upper receiver, lower receiver, and 8.5” handguard.
Product Specifications
Upper Receiver:
- Material: 7075-T6 aluminum (aerospace-grade)
- Finish: Hardcoat anodized (Brown)
- Type: M4 feed ramps for reliable cycling
- Design: Flat-top upper with MIL-STD 1913 Picatinny rail for optics mounting
- Compatibility: Works with standard AR-15 components and calibers
- Forward Assist: Omitted for a sleek, lightweight profile
- Ejection Port Cover: Machined cutout for precision alignment
Lower Receiver (AX556):
- Material: 7075-T6 aluminum, CNC machined for tight tolerances
- Trigger Compatibility: Compatible with all standard AR-15 drop-in triggers
- Integrated Ambidextrous Controls:
- Bolt catch and release
- Magazine release
- Tensioning Screw: Allows fine-tuning between upper and lower receivers to eliminate play
- Magazine Well: Flared design for faster reloads
- Safety Selector Cutouts: Compatible with 45° or 90° throw levers
- Finish: Hardcoat anodized for enhanced durability
8.5” Handguard:
- Material: Lightweight aluminum
- Mounting System: M-LOK slots at 3, 6, and 9 o’clock for accessory attachment
- Top Rail: Continuous Picatinny rail for sights and optics
- Barrel Nut System: Secure mounting with anti-rotation tabs
- Inner Diameter: Fits most suppressors and low-profile gas blocks
- Ventilation: Strategic cutouts for weight reduction and heat dissipation
Key Features
- Modular Design: Easily pairs with other Radian components or AR-15 compatible parts
- Ambidextrous Operation: The AX556 lower offers full ambidexterity, catering to both right- and left-handed shooters
- Durable and Lightweight: 7075-T6 aluminum construction balances strength with portability
- Customizable: M-LOK slots and Picatinny rails allow easy mounting of optics, grips, lights, and other accessories
- Anodized Finish: Unique brown anodizing enhances corrosion resistance and adds a distinct appearance
Package Includes
- AX556 Ambidextrous Lower Receiver
- Matched Upper Receiver with Picatinny Rail
- 8.5” M-LOK Handguard with Barrel Nut
Dimensions and Weight
- Weight (Total Set): Approx. 22 oz
- Handguard Length: 8.5 inches
- Upper/Lower Material: 7075-T6 aluminum
- Finish: Brown anodized
Why Choose the Radian AX556 Builder Set?
- Innovative Ambidextrous Design: Ideal for professional shooters who value control from both hands.
- Enhanced Aesthetics: A stunning brown anodized finish sets this build apart from standard black or FDE AR-15 builds.
- Precision Engineering: Perfect fit between upper and lower to maximize accuracy and performance.
- Versatile Build Platform: Works with standard AR-15 parts, offering flexibility for your custom setup.
- FFL:
- Yes
