Well that may be but it didn't release anyway and I felt safer than if someone else had been holding the handle end!
There aren't too many safe ways to handle a loaded spear gun from the muzzle end while looking at the spear tip. I wasn't even sure it was a spear gun and definitely didn't know that it was loaded. I turned it around as soon as I saw what it was and unloaded it, as an aside the safety was engaged. As for rusted parts, the owner, who I found a week or so later thru SB, told me his buddy had lost it on a Sunday dive. I found it Monday the day after. Sometimes Neptune smiles on ya!