JHFC! That's the poster child for poor gun emplacement. On the skyline? Proper gun placement is on the lee side of the crest, dug in with just enough gun depression to cover the beaten zone.
Down timber laying on the ground should be arrayed in front of the gun to prevent incoming rounds from richocheting into the gunners.
A Boy Scout hunting squirrels should have more sense then this. Pathetic what's happened to my beloved Corps.