Although I don't know the specifics of your situation, my suggestion is to get a proper fire rated gun safe. If you can't at least afford the basic model that has a fire rating, start working overtime! Seriously, I'm amazed when people have hundreds or thousands of dollars in guns, ammo, and accessories, and then buy a cheap sheet metal non-fire rated cabinet. You can get fairly compact safes that you can hide (sort of) We have a Liberty 24 safe that weighs 875# empty and stands about 5' tall. I had to put plants on it just to make it disappear
Anyhoo, whatever you can afford, make sure it's fire rated, and get a Goldenrod dehumidifier for it. Also, BOLT IT DOWN!!! And whatever the gun capacity says,
DON'T BELIEVE IT!!! You will fill it up in no time. Good Luck.
In God We Trust. (Everyone else, hands where I can see 'em)
If Obama is the answer, then the question must have been stupid.