You can go to Lowes or a hardwear store and buy a heavy aluminum rod, and bend a U at one end wide enough to accept your crossbow. Then sharpen the other end with a file or grinding wheel so it will be able to be pushed into the ground easily. I made one for my shotgun when dove hunting, stick it into the ground next to your chair or seat so that your crossbow can lean on the stake with the butt stock on the ground putting the crossbow just high enough that you can drop your arm down and grab it. For the shotgun I wrapped tape around the U to protect the gun barrel, that wouldn't be necessary for a crossbow.