I find it curious that the trees haven’t grown around the gun.
I have in my back yard an old two-man saw which was literally “eaten” by the trees it must have been left leaning on, growing around it. Yet this gun looks as though you could just lift it out.
I nailed a stainless steel pot to a tree for a dog’s water dish so she wouldn’t accidently tip it over. The tree has nearly swallowed it in 20 years.