I'm not saying it's a concern, but the one thing I would test is its "whackability"..
It looks aluminum and relatively possibly thin walled. Will it survive an accidental good whack against another gun in the safe (or it being dropped) if someone is careless or will it bend/dent easily.
I personally have no issue with it being aluminum (if that is indeed what it is), but would just make sure it won't cause a headache from strength later on.