Honestly, most people probably wouldn’t pick up on that. I just happen to have a bit of a fascination with dangerous and destructive devices (guns, swords, you name it). But vacuum welding is definitely a thing, and a revolver has lots of metal-on-metal contact that could be vacuum welded into a solid chunk of metal. Not to mention that standard lubricants wouldn’t stand up to a vacuum very well. So, yeah, it’s probably fine as-is.