Originally Posted by wildbill
I believed you.
All the drums I've had, have some kind of plastic/rubber piece used to keep the barrel nut in place.
The only difference is that they're usually on the inside of the lug, where you can't see them, unless you take the lugs off. These ones on the outside of the Signet lugs must be really firmly fixed into place, as a permanent solution.
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.