Radian Weapons R0428 Model 1 Builder Kit | 10in M-LOK

This Radian Weapons Model 1 builder kit provides a comprehensive parts set for assembling a custom AR-15 platform. The kit centers on a billet upper with a 10-inch Magpul M-LOK handguard and pairs with a Radian AX556 lower receiver to form the core of a tailored build. Included ambidextrous controls and hardware streamline assembly and provide a consistent control layout for both right- and left-handed operators. The kit is suited for range use and competition-style builds where component quality and modularity matter.

Product Specifications

• The manufacturer is Radian Weapons.
• The model/part number is R0428 Model 1 Builder Kit.
• The kit includes a billet upper receiver with dust cover, anti-rotation pin, and lightweight forward assist installed.
• The handguard is a 10-inch Magpul M-LOK modular attachment interface.
• The kit includes a Radian AX556 lower receiver.
• The charging handle included is a Raptor-SD ambidextrous charging handle.
• The safety selector included is a Radian Talon 45/90 ambidextrous safety selector.
• The kit includes a ambidextrous bolt catch and release.
• The kit includes a ambidextrous magazine release.
• The kit includes an enhanced takedown pin set.
• The kit includes an aluminum barrel nut and a barrel nut wrench.
• The hardware includes four handguard cross bolts with washers and nuts.
• The gun type is listed as AR-15.
• The handguard finish is listed as Radian Gray.
• The UPC is 817093024116.

This builder kit brings together matched components for a streamlined build process and consistent ergonomics. It is designed for enthusiasts assembling a precision-minded AR-15 for range work or competition; the included ambidextrous controls and quality hardware make installation and handling straightforward. The kit gives builders a coherent starting point to add barrel, bolt carrier group, and other configuration-specific parts that match their intended use.