Originally Posted by harvestdrum
It's in tight! There is a lip or ridge that locks the plastic piece into the lug. It could be forced out with a small blade screw driver but could possibly get damaged. Best guess....it would pop out with a little pressure and lock back in place. It appears its designed like this incase the barrel nut gets damaged and needing replacement.
I did try a screwdriver to pry that lip, and it would take a lot
of pressure to get it to move. Because I was holding the lug in my hand, I wasn't about to force it. Maybe held in a vise?