The connection between their evidence and conclusions is pretty weak frankly, and entirely impossible to verify anyways. Just from the supposed plans they've posted that looks like a pretty small room, not the backbone for a large scale enforcement operation. Though I don't know much about government facilities, I would expect that any building in which firearms are carried by some employees as standard practice (security) should have a designated safe storage room.

The connection between their evidence and conclusions is pretty weak frankly, and entirely impossible to verify anyways.