Do any libertarians support gun control?

Probably yes, but few. They will probably be Left-winged. There probably are some, but they would be EXTREMELY few (to the best of my knowledge). Actually, the Libertarian Party officially supports the right to own firearms, but they also support abortion, homosexual marriage, marajuana, and just about everything else. Many conservatives (including me) who are against gun control shy away from the Libertarians for this reason.