It was adopted in 1957 and issued to models beginning in 1959. It's served with each individual department of the U.S. navy and nevertheless serves with the armed forces of other nations. The M60 was the final tank to attribute an escape hatch beneath the hull. The escape hatch was https://hoytmachineguns.com/product/sig-553-5-56x45mm-8-9-machinegun/