Calvin Alan Byrd Better Known As 40 Cal Is An American Rapper. He Is 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. Mixtapes 2006 40 To Life 2006 Trigger Happy 2007 Trigger Happy 2 2007 40 To Life Part 2 2008 The Yellow Tape 2008 Leader Of The New School 2008 Dip Masters 2009 New Jack Da Carter After Nino Like New 2010 Trigganometry 2011 God's Gift To An IPod 2012 Watch The Chrome 2012 Target Practice 2012 2nd Hand Smoke