Member crdavis61 Member @crdavis61 • Joined Nov 2012 • Not recently active Remove Connection Are you sure you want to remove from your connections? Timeline Profile Connections Groups Forums Photos Discussions Replies Favorites Discussions Replies Favorites Forum Replies Created crdavis61 Member January 21, 2015 at 2:23 pm in reply to: Dollar Bill Test Question? 1 Bullseye 37L1 -Yes, there are two “nubs” that support the barrel at that location.Some have removed them to make the barrel free floating to the lug. Thanks for the info. I guess they are there to help reduce the barrel vibration.