Sitting around doing nothing so I decided to put another lower together. This one is all Palmetto State Armory with the MOE grip, trigger guard, and butt stock. The pesky pivot pin spring and detent gave me fits until the fifth try I was able to get the pin started properly. Never launched the detent or spring because I kept a thumb over them. Then the disconnector felt like it was binding and I couldn't get any movement in order to align the hole to get the trigger pin set. Once those two things were taken care of everything else went smooth. I haven't decided what upper to mate it with yet.