The “2nd Generation” of Huben K1 manufactured from November 2016 have a “Lothar Walther barrel, 12 rifling, twist 16″ probably not chocked and shoot JSB Jumbo Beast sub MOA at 100 yard. It definitely doesn’t like any light pellets.Universal .22 PCP need to have swappable barrels (1-15 and 1-18 or smooth twist ) ?
I believe that my 0.22 “ MxWerks QR BullpUp” has 1:14"