The R8 standard barrel is built with the safety, speed, and accuracy expected from Blaser. The semi-weight barrel has a 19mm muzzle diameter and a 10.5 oz increase in weight compared to a standard barrel. Safari barrels have a 22mm muzzle diameter and increased weight compared to a standard barrel. Fluted barrels offer less weight and improved heat dissipation. The fluted semi-weight barrel combines the semi-weight 19mm muzzle diameter with a fluted option for less weight. Fluted Match Barrels are an ideal interchangeable barrel.