Consider this somewhat of a pictorial diagram of my collection. First, we have the Sentry-supplied 14-gun safe. It's got a digital lock; no, you don't get to know the number. Just so you get a sense of the thing's size, I stood in one of the pictures - I'm 6'2", and you can see that the safe itself is pretty darned big. Next, note the size of the bolts. My hand's there for reference, but I'll state for completeness's sake that the bolts are nearly 1" across, and there are five of them.

As for the nifty box of ammo, that's a 65lb, 1,440-round mini crate of Cheetah 7.62x39mm ammo, bought in a crate from the helpful dude at Ammunition Brothers.