The M60A1E4 was a conceptual variant that explored the usage of different distant controlled weapons, such as a 20mm gun as secondary armament. A mock-up of this style utilizing the Type C turret was manufactured. America entered a duration of frenzied action through the crisis atmosphere on the Korean War, https://hoytmachineguns.com/product/steyr-mpi-69-9x19-submachine-gun-smg/