Stoner 63

The Stoner 63, also known as the M63, XM22, XM23, XM207 or the Mk 23 Mod 0 machine gun, is an American modular weapons system designed by Eugene Stoner in the early 1960s. Cadillac Gage was the primary manufacturer of the Stoner 63 during its history. Members of the United States military, including Navy SEALs and Marines, used it in very limited numbers during the Vietnam War. A few were also sold to law enforcement agencies.