The C.A.T. M4 tool addresses the critical areas of the bolt and bolt carrier assembly and the carbon buildup that collects on the operating surfaces during prolonged firing. The C.A.T. M4 tool is a lightweight simplistic tool that has five functions in one compact rugged field ready design and it is totally American manufactured. The C.A.T. M4 tool is 3.5 inches long and weighs only 1.4 ounces. It is investment cast from 300 series stainless steel and then the bolt cleaning chamber is CNC machined to precisely fit a mil-spec bolt.