Radian’s Model 1 Builder Kit is an AR-15 / AR pattern build package designed to get you from parts to a complete lower/upper configuration quickly. This kit pairs Radian’s billet upper receiver with the Radian AX556 lower receiver and includes the Radian Raptor SD charging handle. With a 15.5-inch setup and a Gray finish, it’s tailored for builders who want a cohesive Radian platform from the start.
Key Features
Includes a Radian Raptor SD charging handle for smooth, reliable cycling
Billet upper receiver for a precise, upgraded receiver fit and finish
Radian AX556 lower receiver to anchor the build on a quality, feature-rich platform
15.5-inch configuration for compact AR-15 handling characteristics
Gray finish styling for a coordinated look across included components
Build confidence starts with the right core components—this Radian Model 1 Builder Kit gives you a matched upper and lower platform to build on.
