I looked into that awhile back, and contacted John(can’t remember his last name, but he is mentioned in DonnyFL’s website as a machinist friend of Donny’s) I sent John all the pics of the shroud end, the barrel inside, along with all measurements he needed in the form of pics. What it came down to is he suggested that I needed to not only trim back the shroud like I wanted originally, but to also have to trim back the barrel. This would have to be done at the breech end of the barrel. That barrel is like 24” long inside that shroud, and you’ll be lucky if you have even 5” of shroud past the barrel.
My original plan was to have a moderator start just about an inch past the bottle for a more sleek, compact look. As always, I like to have a back up plan, so I contacted Hatsan to see how much it was for a spare barrel and shroud, just in case the end result resulted in poor accuracy,(which John mentioned could possibly happen)excessive rapport, etc., and in the end, along with the machining costs, it was too much $$ to justify for a more sleek, compact look. Currently, my Bully in 30 caliber is shooting so very well, so, after weighing things out, I abandoned the idea.