Pistol, shotgun, rifle, ammo, carbine, secure, coins, gold, silver, fireproof, Bass Pro, Cabela's. The DPX Door Storage System is the most versatile Browning ProSteel safe interior ever. This system maximizes gun storage space by including a modular system of door mounted racks for five (5) long guns as well as pouches and pockets for pistols, ammo and other valuables.