If the photo of the rifle between the boxes is legit, then even after a box was moved out of the way, the remaining boxes apparently were applying enough force on the rifle to keep it from rotating from vertical to flat on the ground.
So there seems to be really only 2 possibilities to explain the flat laying rifle in Tom Aleya’s film sequence
1. At least one MORE box was moved just AFTER the photo was taken but just BEFORE Tom Aleya films Lt.Day lifting rifle up, the result causing the rifle the to fall over flat.
2. The rifle was moved from some other location or was brought to the 6th floor to be filmed by Aleya as laying flat at the location of the boxes. The photograph of the rifle was then taken LATER to.establish a false timeline of the rifle discovered at 1:22pm.
If no.1 , then there is a dishonest account given that there was no disturbance of the scene between the rifle photographed and the rifle then lifted by Lt.Day.
If no.2 then there is outright conspiracy.
Either way , there is reasonable doubt about the veracity of the account of the rifle being found, where and when it was found.