MODEL 1 BUILDER KIT 15.5" GRY HANDGUARD|UPPER&LOWER RECEIVER Manufacturer Model Number: R0404 Manufacturer: Radian Weapons Model: Model 1 Builder Kit Type: Accessory-Receiver Sets Item Type: Accessory Finish: Radian Grey Shipping Weight: 5.85 Feature: Raptor SD Charging Handle Feature: Billet Upper Receiver Feature: Radian AX556 Lower Receiver Optic Adjustable Objective: false Optic Reticle Illuminated: false