Neat story, but that gun has had a lot more done to it than any plane crash and fire could possibly do. The safety is gone, the slide stop broken off, the grip bushings missing (they unscrewed when the plane spiralled down?), plus heavy blows from a hammer or similar tool all over the gun.
I have seen burned guns, and I think that gun was destroyed deliberately, not in any plane crash or fire. It is trash, and IMHO, the story is, too.
Jim