I don"t have one, because that is the first place a thief would go to find my guns. But I hide my seldom used long guns in a wall behind my huge, old upright piano. I believe that very few burglars would try to move that piano, and if they did, they would have to look real close to figure out how to get the wall open. I hide most of my short guns in an old roaster on a high shelf, where I doubt anyone would look for them.
I have a couple of pistols and a 12 gauge in my bedroom. I would expect to lose the 12 gauge if my house was burglarized, but I want that gun right close to me, ready to load, if I might need it in a home invasion. I have always believed in the Boy Scout motto, "BE PREPARED".