I just read the guidance, obviously not against the UCMJ if veterans, Reservist not on AD wouldn’t seem to cover them as a color guard. Kinzinger is a douchebag.
If the Leathernecks were from a reserve unit that might explain the century old rifles. Reserves are frequently slow to clean out the closets and from what I can see , it looks like they left the bolts home. And without bayonets they would not have passed my inspection. If you’re gonna do it, shine it up and do it right.