All Bergara Barrels manufactured to fit the T C Encore frame utilize the same hole spacing and thread size as the O.E.M. equipment from Thompson Center Arms. Center-fire barrels are drilled and tapped for scope only. Manufactured in Bergara, Spain, a region known to produce some of the finest guns in the world, Bergara Barrels has combined the most technically-advanced barrel manufacturing equipment with an unwavering commitment to quality and value. This superior technology combined with decades of barrel making experience delivers a production barrel that performs like it was custom made. 1:9 Right hand Twist