I'm looking for a 5.56 14.5" Chrome-Lined M4 barrel and my usual source (BCM) has been OOS forever-and-a-day. I'm wondering if anyone here has first-hand experience with the Palmetto State Armory Chrome-Lined M4 barrels? Anyone know who makes them for PSA? I tried one of their lower parts kits a while back and was less than impressed but I've heard some good things about their complete uppers so I'm having a hard time deciding whether to give one of their barrels a try.