I doubt Kel-Tec will bother with chrome lined barrels anytime soon. These pistols aren't really target guns that rack up huge round counts, they are intended to be concealed backup weapons that get carried a lot, shot just enough to keep your eye in. If you should ever wear one out, KT will give you a new one.
Don't understand why you seem to think you need a chrome barrel to carry with a round in the chamber. Why would that make any difference??? By the way, the Makarov DOES have a chrome barrel and you can easily carry with one in the pipe. I do it all the time. The safety decocks the pistol and can be left in the safe position or moved back to the ready position. In the later case, you have a double action pistol just like the P-9. You can carry safely either way.