Radian Weapons R0436 Model 1 Builder Kit 8.50″ M-LOK

The Radian Weapons R0436 Model 1 Builder Kit is a comprehensive AR-15 builder set designed to provide the core components and hardware needed for a custom build. The kit centers on an 8.50″ Magpul M-LOK handguard and includes a billet upper receiver with several pre-installed components for streamlined assembly. Included items cover ambidextrous controls and essential mounting hardware for a functional, adaptable rifle platform.

Key Specifications

• Includes a billet upper receiver with dust cover, anti-rotation pin, and light weight forward assist installed.
• Features a hand guard with Magpul M-LOK modular attachment interface listed at 8.50 inches in the product name.
• Includes a Radian AX556 lower receiver.
• Supplies a Raptor-SD ambidextrous charging handle.
• Equipped with a Radian Talon 45/90 ambidextrous safety selector.
• Includes an ambidextrous bolt catch & release and ambidextrous magazine release.
• Contains an enhanced takedown pin set.
• The kit provides an aluminum barrel nut and barrel nut wrench plus four hand guard cross bolts, washers, and nuts.
• Handguard finish is Radian Gray.
• Designed for the AR-15 platform.

This builder kit assembles the practical components and ambidextrous controls that experienced builders appreciate for range use, duty-style configurations, or a personalized defensive or sport rifle project. The included hardware and pre-installed upper components help simplify installation while preserving flexibility for customization and long-term serviceability.