we 've told folks in the past and have shown numerous others, "how" to check to see if the finish OR the actual material is or is NOT 'stainless'......in some out of the way spot, like under the grips and inside of the hollowed out area of the frame, scrap or scratch through the surface and apply a bit of cold blue on a Q-tip, if it turns BLUE ( darkens) it is NOT stainless steel END of doubt no harm or foul to find this out, will NOT damage or harm anything, it ENDS the question....duh (yes, a magnet will stick to gun alloy stainless)
Keep hearing these stories of guns that have an armaloy or Metalife finish, and if its polished out, will LOOK just like stainless..........
and if it doesn't "turn blue" then BINGO you may have found one of the very "few" anomolies that escaped the factory..............you would have KNOWN in less time than it took to type this reply.....