Truck Box. Save a ton of money over a decked box. Solid built with 2x8 frame and 3/4 plywood on top.

Front piece of diamond plate is installed. Left side has 2 slots for shotguns. Right side is more open but has dividers that are built and could be tacked in place where you want with brad nails.

Approximately 50 wide x 67 long x 9.25 high