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40 Cal
Calvin Alan Byrd (born December 17, 1981), professionally known by his stage name 40 Cal , is an American rapper . He was a member of Harlem -based hip-hop group The Diplomats .
40 Cal made his first appearance on the self-titled theme song, "40 Cal" for the Dipset album Diplomatic Immunity 2 . He took a part on MTV2 's Fight Klub MC battles