Grey Ghost Precision worked hard to produce an extremely accurate semi-automatic rifle that fit specific requests from soldiers operating in Afghanistan. Coupled with evaluations by Special Forces marksmanship instructors, competition shooters and hardcore hunters, the final form of the "Barking Dog" has several cutting-edge enhancements that make it the most reliable nail-driver in its class. Now this level of precision is available in a complete upper receiver configuration. GGP Billet Receivers are precisely machined from 7075-T6 Aluminum for a perfect fit to your lower. FeaturesTrue Black Type III Class 2 Hard Coat AnodizeTighter than Mil-Spec tolerance, with critical tooling dimensions are held to within +/ - .001"Functions with nearly all available mil-spec parts