Oh come off it guys, a gun rack is a natural on the ROPS!
How else are you going to dispatch that dastardly wabbit in the carrot patch? I've never needed protection while riding my tractor, but I've had garden pests that needed killing.
And for those of us who shoot trap or sporting clays, a tractor is a natural way of getting the guns, clay pigeons and a couple of mechanical throwers out to a field. The problem is always carrying the guns, because some of those things are pretty darn expensive and scratching the wood on a fine pigeon grade shotgun can make a grown man cry.
And when I use a PHD I may not need a gun, but it sure is handy to have a couple shovels at hand. A gun rack, or some other very similar device, attached to the ROPS would certainly make it easier to carry a couple of long handle tools. I carry a limb saw, branch loppers (2 kinds), and other assorted landscape tools in the toolbox mounted behind my seat, but as my tool box is 18" tall by 16" wide, I can't get large tools like a shovel in there. I have often thought about a way to carry landscape tools on the ROPS.
Vertically mounted tools would hit the garage door frame if they extend too far up over the top of the ROPS. Tools mounted across the ROPS in a horizontal manner would not gie in the way of anything other than your rear vision if you turned around to look backwards.