[Zfurlong]

Yeah it's 6.03mm promy from airsoftparts.ca, I milled out the rear part of the screw hole in the hop unit using a Dremel and a diamond drill bit, being careful to not damage the remainder of the threads for the screw. Then I placed a bridge nub on the inside of the hop unit (where the barrel goes through). It took a bit of work to get the inner with the rubber over it, to slide in under the bridge nub, but once it was in there it fit well.and once it was all in the hop unit, I placed the screw back in to the threads. Then put it all back together. She doesn't chrono much more than between 380 and 400 in position 1. Position 2 yields approx 420-430 on 0.2's

Originally Posted by Magwell

Cool, I would be interested in seeing how it works. Post the pics and info here, keep it in one place for future users.

And what ID is the barrel? 6.03? Also - what FPS is yours shooting with 0.2g on stock internals? It should be slightly up over what is was before with a smaller diameter barrel.