Radian Weapons AX556 Builder Kit Complete Upper/Lower Set 14-inch OD Green

The Radian Weapons AX556 Builder Kit (Radian part no. R0415) is a matched complete upper and lower receiver set built around Radian’s Model 1 design philosophy of premium raw materials and precise CNC machining, finished in OD Green for this 14-inch configuration. Every AX556 set is assembled by hand by a trained gunsmith who inspects, test-fires, and cleans the rifle before it ships, and the design carries fully ambidextrous controls so left- and right-handed shooters get equal utility from the same platform. This 14-inch configuration gives builders a rifle-length receiver set ready for the rest of a custom build.

Key Specifications

• Multi-caliber compatible lower/upper receiver set, not a bare single component.
• 14-inch configuration suited to a rifle-length build.
• Fully ambidextrous controls give equal utility to left- and right-handed shooters.
• Each set is hand-assembled, test-fired, and cleaned by a trained gunsmith before shipping.
• Semi-automatic fire control group ships installed and ready to complete.
• Finished in OD Green for a distinctive, field-ready appearance.
• Ships at approximately 5.4 pounds.
• Backed by Radian’s lifetime guarantee on every Model 1 receiver set.
• Machined from billet 7075-T6 aluminum for a precision-fit receiver set.

Frequently Asked Questions

Does this kit include both the upper and lower receiver? Yes, it is a matched receiver set covering both halves of the rifle, not a single component.

Are the controls ambidextrous? Yes, Radian builds full ambidextrous controls into every AX556 for equal left- and right-hand use.

Is this set backed by a warranty? Yes, every Radian Model 1 receiver set carries a lifetime guarantee.

Buy the Radian Weapons AX556 Builder Kit Complete Upper/Lower Set 14-inch OD Green

Order the Radian AX556 Builder Kit from our Radian Weapons lineup of AR15 build kits for fast, insured shipping to your FFL from our Lubbock, Texas gun shop.