MullerWorks is a new manufacturer, but Dan Muller is a long-timer in the industry. Dan has been deeply involved in several top barrel manufacturers - both cut and button - providing innovations and process improvements in an effort make the best barrels possible. Mullerworks making button rifled barrels and using new lubrication methods and processes that are producing extremely uniform barrels in both dimension and twist rate. I started testing these barrels in early 2012 and am only selling what I've shot and know works. The arrangements we have with MullerWorks will likely produce special order barrels faster than other manufacturers. These barrels will NOT disappoint. Ask about the 22 rimfire barrels, they are among the best in the industry.