[SVTCobra03]

How many times does this need to be said: Buy a few usable guns and a lot of ammo.

I would recommend a minimum of 10,000 rounds for every tactical rifle, 5000 rounds for every tactical shotgun and 1000 round for every pistol. And don't forget optics, batteries, spare parts and cleaning supplies.

[DuncanWaring]

If you expect to need that much ammo, you need spare barrels, too.

And tools to install them.