Radian Weapons Model 1 Builder Kit | 15.5″ M-LOK | R0406

The Radian Weapons Model 1 Builder Kit (MFG# R0406) is a coordinated parts package for building an AR-style rifle around a 15.5-inch Magpul M-LOK hand guard finished in Flat Dark Earth (FDE). The kit combines a billet upper receiver with a Radian AX556 lower and a suite of ambidextrous controls intended for custom builds and sport shooting applications. It is described as a multi-caliber kit and ships with the common installation hardware required to assemble the upper/handguard interface.

Product Specifications

• The manufacturer is Radian Weapons.
• The model is Model 1 Builder Kit.
• The manufacturer part number is R0406.
• The hand guard included is a 15.5″ Magpul M-LOK hand guard finished in FDE.
• The handguard interface is Magpul M-LOK.
• The handguard finish is Flat Dark Earth (FDE).
• The kit includes 1x Billet Upper Receiver with dust cover and lightweight forward assist installed.
• The kit includes 1x Radian AX556 Lower Receiver.
• The kit includes 1x Raptor-SD Ambidextrous Charging Handle.
• The kit includes 1x Radian Talon 45/90 Ambidextrous Safety Selector.
• The kit includes 1x Ambidextrous Bolt Catch & Release.
• The kit includes 1x Ambidextrous Magazine Release.
• The kit includes 1x Enhanced Takedown Pin Set.
• The kit includes 1x Aluminum Barrel Nut and 1x Barrel Nut Wrench.
• The hand guard mounting hardware includes 4x Hand Guard Cross Bolts, Washers & Nuts.
• The product is listed as Multi-Caliber.
• The UPC is 817093023898.

This kit provides a complete foundation for a precision-oriented AR-style build, combining matched components and installation hardware to simplify assembly. Whether the goal is a competition-oriented rifle or a range-focused custom build, the Model 1 kit offers ambidextrous controls and a full complement of parts that experienced builders value for modularity and ergonomics.