I’m puzzled by the fact that an aged man who seems to be in a grave with one foot would commit suicide. What would drive an old man who put so many years in to such an act?
There are hand tools around the corpse, including a hacksaw but I don’t think he used it to saw off the barrel cause these are only suitable for wood cutting. The blast caused mad damage to his face. Not even the nigh indestructible eyes seem to have made it, but maybe they’re hiding under the skin somewhere.
I think the old man put the barrel under his chin, not in his mouth. It’s crazy that his hands are grasping onto the barrel, as if he had time to do that after pulling the trigger. Unless he triggered the shot with a toe or… some other body part in that region.