The foundation of any quality AR-15 rifle is a precision lower receiver. When it comes time to build the ultimate rifle, a Wilson Combat lower receiver is the ulimate foundation.Due to the nature of forged lowers, some pitting and machine marks are natural and unavoidable. These marks do not affect function.Features7075-T6 forgings machined to Mil-Spec Plus tolerancesMil-Spec type 3 hard anodize black finishGood match with Wilson BILLet-AR upper receivers and any standard AR barrel