Ownership of firearms is now, effectively, a privilege that is revoked from felons and the mentally incompetent.  "the right of the people to keep and bear arms.." can be revoked.  And it is a qualified right, qualified by the clause "A well regulated militia."  The original right was put in so that neither the individual states nor the federal government could disarm the citizen militias.  In 1789, no one gave any more thought to taking the hunting and defense muskets from yeoman farmers and frontiersmen, than they did to confiscating their plows or harrows.

I had an air rifle, not a bb gun.  Only accurate arms are interesting, the rest are toys.  Your dismissive tone is duly noted.