Every DU-HA is custom designed to fit a particular model of truck. The Dodge Ram Quad Cab/Crew Cab model is designed to fit underneath your pre-existing back seats. It's constructed from heavy duty polyethylene and comes with a lifetime warranty. If your truck came equipped with a metal trays or a lid system under the back seat, you will need to remove the trays/lid prior to installing your DU-HA. These trays are interchangeable, so you will be able to re-install them later if needed. This DU-HA holds 2 rifles or shotguns, 1 with scope, but may not act as a legal gun case in states with gun case laws, unless guns are first placed in sleeves. Check with your local authorities for the gun case laws in your state.