Report Custom barrel milling in General Discussion - Any topic is welcome here!!! Posted July 14, 2016 I'll have to give them a call today. It looks like they could build the blank and then send it off to get finished by a gun smith. To me its worth it to have the XTR setup differently for various tasks. I have found that both hot rods and guns will make me go broke. That is why I build everything I can. That being said, when I get something planned out it is a relentless pursuit to have it materialize. The 32 Dodge had to get a intake manifold custom sand cast to fit the 4-71 just right on a 4.3 V6. Seems a lot like this shottie in ways.