If someone with a Katran .22 could take a couple of measurements when you have the barrel out would awesome. I’m looking to maybe if possibly getting a Katran Hp barrel & installing it in my Caimam X for slugs. Need barrel O.D, length to grub screw flats for securing barrel & length to Transfer Port. Maybe I could squeeze a little more out of my X going from 520mm to 700mm non choked barrel for slugs.