03-17-2015, 05:47 PM
You are correct moto. If you go look at AA's site, they offer the Millennium brake in both 9/16x24 and 3/4x28 on the Grendel configuration. My barrel came 3/4x28. Tell you what, taking this thing apart has been a chore. Both the barrel and barrel nut had loctite on them and the gas block is double pinned. Working on getting it off now. Sooner I get this done, the sooner it goes in the mail to the smith and I can get it back.

