Second Amendment Rights
There is (generally) no one who will dispute the right you have to defend yourself and your family. When you get right down to the "flint and powder" of it (pardon the pun), the Second Amendment to the U.S. Constitution is basically about self defense.
Self-ownership implies the right to self-defense. Libertarians yield to no one in their support for our right as individuals to keep and bear arms. We only wish that the Second Amendment to the U.S. Constitution said 'The right to self-defense being inalienable...' instead of that stuff about a 'well-regulated militia'. Anyone who thinks that government - any government - has the right to disarm its citizens is NOT a Libertarian!
Protect yourself and family but do no harm to others through force (or threat of force).