I'm building a vault in my safe room to hold my guns and survival/range/hunting gear.
The vault is actually a good sized closet that i've lined with UL rated level III hard ballistic fiberglass panels (they'll stop up to 44 magnum gunfire, and a large amount of physical punishment from things like sledge hammers or axes). The vault door is going to be a heavy solid oak door with a full length internal piano hing and dual FOB keypad activated electronic dead locks. The interior of the door is also lined in UL rated ballistic fiberglass panels.
I still have to refinish the interior walls and the weapons hanging arrangements, but here is a picture of it as it is right now.
Some of my guns are still out getting work done to them, so this is only a partial picture of my collection.
The safe room the vault is in also going to be highly secure, and will be my defensive hold out room in case of home invasion, natural disaster, foreign invasion or the zombie apocalypse. LOL....