EDITED
I don’t mean to imply (or say) that YOU have a lack of Bitachon by wanting to own a gun. I do feel, however, that owning a gun in a safe neighborhood (yours might not be) is displaying a lacking (however small it may be) in Bitachon in Hashem. Owning a gun is very dangerous and has a lot of risks and personally I feel that if a person feels that they need that to be protected by owning a gun is displaying a lack of bitachon in Hashem. Only the big gun lobbyists believe that it’s irresponsible for ANY American not to own a gun.
But as I said – that’s just MY opinion.