Radian Weapons AX556 Billet Upper/Lower Receiver Set 8.5" Handguard - Gray

AX556 Billet Upper/Lower Receiver Set 8.5" Handguard - Gray

The Radian AX556 Billet Upper/Lower Set offers unmatched machining precision, ambidextrous controls, and a compact 8.5” M-LOK handguard, making it an ideal foundation for SBR builds, PDW configurations, or CQB setups. Built from billet aluminum, it maintains tight tolerances and superior durability, ensuring flawless function in tactical, duty, or competitive environments. Finished in Gray Cerakote, this set delivers rugged protection with an aggressive aesthetic while remaining highly adaptable for both left- and right-handed shooters.

Every Model 1 build is hand-assembled, inspected, test-fired, and cleaned, guaranteeing next-level quality control for the most discerning shooters.

Billet Upper & Lower Receivers
CNC-machined for maximum precision, durability, and refined aesthetics.

Fully Ambidextrous Controls
Includes bolt catch/release, magazine release, and safety selector for optimized usability from either side.

Raptor-SD Ambidextrous Charging Handle
Enhanced gas venting design, perfect for suppressed applications.

Radian Talon 45/90 Safety Selector
User-configurable for either 45-degree quick throw or standard 90-degree engagement.

8.5" M-LOK Handguard
Compact and lightweight, offering rigid accessory mounting and improved maneuverability.

Gray Cerakote Finish
Corrosion-resistant and tough, built to endure demanding conditions.

Lightweight Forward Assist & Anti-Rotation Pins
Enhances reliability without adding excess weight.

Aluminum Barrel Nut & Barrel Nut Wrench Included
Provides secure barrel attachment and easy installation.

Hand-Inspected & Test-Fired
Guaranteed for life.

Specifications

• Caliber: 5.56 NATO / .223 Remington / Multi
• Receiver Material: Billet Aluminum
• Finish: Gray Cerakote
• Handguard: 8.5" M-LOK Modular Interface
• Safety Selector: Radian Talon Ambidextrous (45/90 Configurable)
• Charging Handle: Radian Raptor-SD Ambidextrous
• Bolt Catch & Release: Fully Ambidextrous
• Magazine Release: Fully Ambidextrous
• Included Hardware:
  • Aluminum Barrel Nut & Barrel Nut Wrench
  • Enhanced Takedown Pin Set
  • Hand Guard Cross Bolts, Washers & Nuts