Jerry posted this image on another thread:
He seems to have misunderstood that Weitzman was on the floor looking through a pallet.
In the graphic the yellow/orange arrows are Jerry's and are part of the original graphic to which I have made some additions.
Ignore the yellow/orange arrows.
The stack of boxes marked with a green "A" in each pic rests on a pallet [it is the same stack seen from different angles]
To the bottom picture I have added a green arrow to give an indication of Weitzman's LoS as he was on the floor looking through the pallet.
It demonstrates that Weitzman could have seen the barrel portion of the rifle from his viewpoint.