I'm liking the ULW's from WilandUSA and Taccom (when in stock),.. match your bolt and buffer set up. Foxtrot Mikes work and there are other options out there. For plinking it doesn't matter what you buy,.. for steel plate racing go lightweight.
Start here,...
This thread is for the all the new kids on the block who want to put together their own PCC, but were unsure where to begin. The following parts list will make it easy for them to assemble a new PCC that will work the first time, every time, and win matches. Barrel: 16 inch Kaw Valley, or Faxon. ...
I went Colt SMG for the Uzi / Colt mag compatibility. I *love* my JP Rifles upper. It's perfect and oozes quality. Yankee Hill Machine YHM135 lower.
I used to use my PWA lower with a mag well block, but it could be pretty finicky at times. Some Uzi mags wouldn't feed well.
Now every mag I own runs perfect.