I have seen people keep their firearms in simple closets eyelet through the floor with a cable through the trigger guards, with one of those peperspray bomps attached to the doorknob. Not the optimum way of doing it but I am sure anyone trying to get to them would be in for a nasty surprise. Most criminals do not come prepared with the tools necessary to defeat major security methods. If they do you can believe you know the crooks as they had prior knowledge