Radian Weapons R0406 Model 1 Builder Kit AR-15 15.50" Magpul M-LOK Handguard - Flat Dark Earth

The Radian Weapons Model 1 Builder Kit gives AR-15 builders a premium foundation for a custom upper assembly. Built around Radian's signature billet upper receiver and a 15.50" Magpul M-LOK handguard in a Flat Dark Earth finish, this kit bundles the core upper components needed to drop onto a mil-spec or matched lower receiver.

At the heart of the kit is the Radian Model 1 billet upper receiver, precision machined from 7075-T6 aluminum for an excellent strength-to-weight ratio. The upper ships with the dust cover, anti-rotation pin, and lightweight forward assist already installed, so the builder only needs to add a barrel, barrel nut, handguard (included), gas system, and bolt carrier group to complete the upper assembly. The receiver is engineered to accept standard AR-15 barrel extensions and works with any mil-spec bolt carrier group.

The included 15.50" Magpul M-LOK handguard provides a full-length platform with M-LOK slots along the sides and bottom for accessories such as weapon lights, lasers, foregrips, and bipod mounts. Its slim, lightweight profile keeps overall rifle weight manageable while offering generous mounting real estate. Finished in Flat Dark Earth to match the billet upper, the handguard complements other FDE components and accessories in a coordinated custom build.

Radian also includes their ambidextrous charging handle, allowing both right- and left-handed shooters to run the action without changing grip position. This is a hallmark Radian feature and one of the reasons the Model 1 platform has earned a strong following among AR builders who want premium ambidextrous controls straight out of the box.

Kit includes:

• 1x Radian Model 1 Billet Upper Receiver with dust cover, anti-rotation pin, and lightweight forward assist installed
• 1x 15.50" Magpul M-LOK Handguard in Flat Dark Earth
• 1x Radian Ambidextrous Charging Handle

Designed for the AR-15 platform, the R0406 Model 1 Builder Kit is an ideal starting point for a high-end custom AR-15 build.

DISCLAIMER: Firearms and receivers are subject to state-specific shipping restrictions and must be transferred through a valid FFL dealer. Please visit our shipping restrictions page to review all applicable restrictions for your state. Subject to change.