In today’s why didn’t I think of that and become rich category is the Stack-a-Rest from Quake Industries.
It’s a series of stackable foam pieces, kind of like Legos Gone Wild that fit together in a number of different ways. Stack one, two, three or all four to adjust your rifle rest height and use any leftover pieces under your support arm. If you invert one and put the flat sides together, you can shove a cartridge through the center hole to create a stable rotating turret. The angular side down allows stable mounting on window frames, truck doors, branches, rocks or most whatever else is handy. One of the pieces even has a slit cut across so it will fit snugly on a car window.
The whole set only weighs ten ounces, so it’s easy to tote to the range or strap to your backpack while on a hunt.
Cool idea. They’re starting to hit the stores now.