PCF is probably changing the name up because they are trying to market to LE more. They don't want to be toting about AR's with "Plum Crazy" plastered on them. They need to make one with a trigger guard that can be swapped out and life would be good.
Plumcrazy was "rumored" to be changing the name on their lowers approx 2 years ago. This has never happened.
These NEW FRONTIER ARMORY LOWERS are NOT plumcrazy lowers. Same molding company and mold, with upgraded polymer and springs, but an entirely different company. It's not a re-branded PlumCrazy.