I’m going by all the pictures Ive seen of the short rail. Early pics from AI. Plus, it’s a short rail and barely 6 inches. Only rail I can find for it is a 5.5 inch rail. Otherwise there is a 7 inch rail that would be too long.No. The flat edge goes to front of barrel. That way the full length rail on the fore arm (if he were to put one on) would be flush to the action rail.
But yeah Whatever you like