RADIAN WEAPONS R0436 Model 1 Builder Kit | 8.50in M-LOK

This Radian Weapons R0436 Model 1 Builder Kit is a parts-focused AR-15 builder package intended for assembling a high-quality rifle platform. The kit combines a billet upper with an installed lightweight forward assist and dust cover, plus a Radian AX556 lower and common ambidextrous controls. It is suited for builders who want a mostly complete receiver set with an 8.50-inch Magpul M-LOK handguard for accessory compatibility and compact handling.

Product Specifications

• Manufacturer: RADIAN WEAPONS.
• Model: R0436 Model 1 Builder Kit.
• Manufacturer part number: R0436.
• The UPC is 817093024192.
• Gun type listed: AR-15.
• Handguard system: Magpul M-LOK.
• Handguard finish: Radian Gray.
• Handguard length: 8.50 inches.
• The kit includes a billet upper receiver with dust cover, anti-rotation pin and lightweight forward assist installed: 1x Billet Upper Receiver.
• The kit includes the lower receiver: 1x Radian AX556 Lower.
• Included charging handle: 1x Raptor-SD Ambidextrous Charging Handle.
• Included safety selector: 1x Radian Talon 45/90 Ambidextrous Safety Selector.
• The kit includes ambidextrous controls: an ambidextrous bolt catch & release and an ambidextrous magazine release.
• Included takedown hardware: 1x Enhanced Takedown Pin Set.
• Included mounting hardware: 1x Aluminum Barrel Nut, 1x Barrel Nut Wrench, and 4x Hand Guard Cross Bolts with Washers & Nuts.

This builder kit provides a curated set of receiver components and ambidextrous controls to simplify assembly for a compact AR-15 platform. The 8.50-inch M-LOK handguard offers accessory mounting flexibility while keeping overall length controlled for range and competition builds. For builders prioritizing matched receivers and quality ambidextrous controls, this kit assembles the common parts needed to complete a compliant AR-15 build.