The Radian Weapons Model 1 Builder Kit (part no. R0396) pairs the AX556 lower receiver with a 17-inch handguard in a Grey finish, giving builders extended rail space for a longer-barrel AR-15 build. Chambered for the .223 Remington/5.56 NATO family, this semi-auto builder kit bundles core receiver components together so you spend less time matching compatible parts. It is built for shooters assembling a longer-handguard rifle who want a distinct Grey finish from the start.

Key Specifications

• Built around the Radian AX556 lower receiver.
• Includes a 17-inch handguard for extended accessory and light mounting space.
• Chambered for .223 Remington/5.56 NATO on the AX556 platform.
• Finished in Grey for a look that stands apart from a standard black build.
• Runs a semi-auto action, firing one round per trigger pull with standard AR-15 components.
• Ships at a 5.85-pound shipping weight as a bundled builder kit.
• Includes a billet upper receiver with dust cover, anti-rotation pin, and lightweight forward assist installed.
• Includes the Raptor-SD ambidextrous charging handle for fast, snag-free manipulation.
• Equipped with the Radian Talon 45/90 ambidextrous safety selector.
• Includes an ambidextrous bolt catch/release and magazine release.

Frequently Asked Questions

What does this kit include? The Radian AX556 lower receiver bundled with a 17-inch handguard in a Grey finish.

What caliber is this kit built for? It is chambered for the .223 Remington/5.56 NATO family on the AX556 platform.

Why choose a 17-inch handguard? The longer handguard gives you more rail space for lights, grips, and other accessories on a longer-barrel build.

Buy the Radian Weapons Model 1 Builder Kit with 17-inch Handguard, Grey

Order this Radian Weapons Model 1 builder kit from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and build on the AX556 platform with room to spare. Browse our full selection of AR15 lower receivers for more build options.