Was talking with a few people about the UBAR3 and using a M5 nut in a recessed pocket for the grip screw. Looking at the files there are about ten different versions of the UBAR3 but I couldn’t find anything about the differences? The file names are clear as mud.
It’s in the build tutorial. Do you want a Carbine or Rifle buffer tube? Does your upper have a Forward Assist? Will you use anti-walk pins for your FCG? The UBAR-X has an integrated grip and the regular allows you to add your own grip.
Ah, I didn’t have much time to read and skimmed it and missed it. Doesn’t sound like anything that affects the grip nut… Thanks!