Radian Weapons Builder Kit 15.5" FDE Rifle

The Radian Weapons Builder Kit 15.5" FDE Rifle is purpose-built for operators, law enforcement professionals, and serious rifle builders who demand reliability and modularity in a combat-ready platform. This complete upper receiver assembly strikes the balance between a fighting rifle and a customizable base for mission-specific configurations. Whether you're building a duty rifle, home defense platform, or precision carbine, the Radian Builder Kit delivers the performance standards expected in high-stakes environments.

Built on proven mil-spec AR-15 design principles, the 15.5-inch barrel length offers a compact profile ideal for close-quarters work while maintaining velocity necessary for effective terminal performance downrange. The Flat Dark Earth (FDE) finish provides corrosion resistance and reduced reflectivity in operational environments. At 5.44 pounds, this upper assembly delivers balanced handling without sacrificing durability—critical for extended carry and repetitive shooting cycles. Radian's manufacturing reputation for tight tolerances and finish quality ensures your builder kit components work seamlessly with quality lower receivers and trigger systems.

Tactical professionals appreciate builder kits for their flexibility—you control trigger selection, stock choice, and furniture to match your exact mission profile. This Radian kit pairs with mil-spec lower receivers and accepts standard AR-15 charging handles, bolt carrier groups, and furniture. Installation requires basic gunsmithing knowledge or professional assembly; ensure compliance with all federal, state, and local firearms regulations before assembly. The compact 15.5-inch configuration excels in vehicle work, tactical entries, and situations where maneuverability matters without sacrificing practical accuracy.