Product Description The RADIAN WEAPONS Model 1 Builder Kit provides a premium foundation for an AR-15 style build, pairing a billet upper receiver assembly with a Magpul M-LOK compatible handguard and a matching Radian lower receiver. Designed around Radians well-known ambidextrous controls, this kit includes key components like the Raptor-SD ambidextrous charging handle and Talon 45/90 ambidextrous safety selector, along with the required mounting hardware for the handguard and barrel nut system. Add your preferred barrel, bolt carrier group, gas system, and buffer system to complete your build. Product Highlights Complete AR-15 builder kit with billet upper receiver assembly and Radian lower receiver 15.5 inch handguard with Magpul M-LOK modular attachment interface for lights, grips, bipods, and accessories Ambidextrous control package including Raptor-SD charging handle and Talon 45/90 safety selector Includes barrel nut, barrel nut wrench, and handguard cross-bolt hardware for installation Upper includes dust cover, anti-rotation pin, and lightweight forward assist installed Specs Brand: RADIAN WEAPONS Model: Model 1 Builder Kit Manufacturer Part Number: R0406 UPC: 817093023898 Platform: AR-15 / AR-Style Handguard Length: 15.50 in Handguard Interface: Magpul M-LOK modular attachment interface Color/Finish: Flat Dark Earth Receiver Material: Billet 7075-T6 aluminum Included Components: Billet upper receiver (dust cover, anti-rotation pin, lightweight forward assist installed); handguard; Radian AX556 lower receiver; Raptor-SD ambidextrous charging handle; Talon 45/90 ambidextrous safety selector; ambidextrous bolt catch & release; ambidextrous magazine release; enhanced takedown pin set; aluminum barrel nut; barrel nut wrench; (4) handguard cross bolts, washers & nuts Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.