Quick view Wilson Combat Wilson Combat Mil-spec Lower Receiver, Wils Trlowerano Lower Ar15 Milspec Anodized $102.95 The billet ar-15 mil-spec features 7075-t6 forgings machined to mil-spec plus tolerances and a mil-spec type 3 hard anodize black finish.Good match with wilson billet-ar upper receivers and any standard ar barrel.Note: requires a lower parts kit, buffer... Compare Add to Cart