The M60A1E4 was a conceptual variant that explored the usage of different remote managed weapons, together with a 20mm gun as secondary armament. A mock-up of this design and style utilizing the Type C turret was made. This segment requires further citations for verification. Remember to assist strengthen this post https://hoytmachineguns.com/product/ingram-m11-m11a1-380-acp-small-frame-mac-powder-springs-ga/