With the Radian AX556 lower receiver, you can customize and upgrade your AR15's performance or begin your own build with a premium foundation. The Radian Weapons AX556 AR15 lower receiver is equipped with the Radian Talon 45/90 ambidextrous safety selector, a left-side mag release, a right-side bolt release, an enhanced takedown pin set, and a spring-loaded self-adjusting receiver tensioner that reduces movement. This 223 Remington lower from Omaha Outdoors is precision machined from billet 7075-T6 aluminum with an anodized finish and offers the durability and precise fit and finish that any serious shooter demands.Specifications:Manufacturer: Radian WeaponsModel:AX556Fits:AR-15Caliber:223 Remington, 5.56Color: BlackFinish: Anodized Black, Brown, GreyIncludes: Enhanced Takedown Pin Set, Radian Talon 45/90 Ambidextrous Safety Selector, Self-Adjusting Receiver TensionerMaterial:7075-T6 AluminumMPN:R0166