When I go thru MD, if I'm in the truck the gun is unloaded, locked in the box fastened to the BACK seat frame. Ammo is locked in the second box. If I'm in the car, the gun is locked in the box in the trunk, fastened to the spare tire. Same with the ammo. I take no chances in MD. In DE (or other legal states), if I have to leave the gun in the car, I'll lock it in the box under my seat.