- The Radian Weapons Billet Upper & Lower Builder Sets were created to function as the best item for anyone looking for a top quality selection. These AR15 Receiver Sets from the professional product specialists at Radian Weapons are designed working with long lasting and reliable materials, in order to provide you with product that is going to be powerful for many years. Designed utilizing some of the very best attainable materials and engineering, these special AR15 Receiver Sets through the product professionals at Radian Weapons can last you a lifetime. Radian Weapons have been making superior quality merchandise for many years and the Radian Weapons Builder Kits are their very own manner of demonstrating just how much they care. Includes: 1x Billet Upper Receiver w/Dust Cover, Anti-Rotation Pin & Light Weight Forward Assist Installed, 1x Hand Guard w/Magpul M-LOK Modular Attachment Interface, 1x Radian A-DAC 15 Lower Receiver, 1x Raptor-SD Ambidextrous Charging Handle, 1x Radian Talon 45/90 Ambidextrous Safety Selector, 1x Ambidextrous Bolt Catch & Release, 1x Ambidextrous Magazine Release, 1x Enhanced Takedown Pin Set, 1x Aluminum Barrel Nut, 1x Barrel Nut Wrench, 4x Hand Guard Cross Bolts, Washers & Nuts