Start your build off right with the mkii version of the ggp-s series which brings a level of customizability never before seen in our rifle receivers.The billet receivers are precisely machined from 7075-t6 aluminum for a perfect fit.The lower receiver includes ggp's ambidextrous bolt release as a standard feature, as well as a flared magwell and integral trigger guard.Tighter than mil-spec tolerance, the receiver set functions with nearly all available dpms pattern large frame parts.Gun Model: AR-15Gun Type: AR PlatformCaliber: Multi-CaliberMaterial: 7075 T6 Aluminum