babacksh@andrew_speth As you can see the Dye UL Barrel is a two piece setup. The front piece has a larger diameter front and then slims down to thread into the back piece that is larger at the front and back section and slender in the middle.
babacksh I have the Dye 2 piece Ul barrels. They are large at the opening and narrow towards the center. What size would you recommend in using for these kind of barrels ?