The M60A1E4 was a conceptual variant that explored the use of various distant controlled weapons, such as a 20mm gun as secondary armament. A mock-up of this design utilizing the Type C turret was constructed. The barrel latch system (a swinging lever) could catch on the gunner's products and accidentally https://hoytmachineguns.com/product/sig-553-5-56x45mm-8-9-machinegun/