I welded up this one using 2" square tube and 6" C-purlin. It's very stable and can easily be lifted in and out of a truck bed. I added the ammo cans and keep targets, stapler and shooting bags in them. We leave it at the deer lease and just drag it to whatever shooting distance we want.
It needs wheels
Not needed for what we do. It has skids (runners) and is much more stable this way. It stays at our shooting range and we just drag it across the pasture with the truck or ATV to whatever shooting dance we want.