Introducing the Hudson Mfg threaded barrel with a premium nitride finish and 1/2 x28 thread pitch. This drop-in factory barrel provides the opportunity to mount your favorite can for polite shooting or your favorite compensator for rude, but arguably more fun endeavors. The threaded version of the patent-pending barrel design was tested under a high-speed camera and showed that the H9 threaded configuration outperforms industry standards. The H9 threaded barrel requires a Nielsen type device for standard can configurations. We recommend subsonic ammunition for the best suppression levels, and 124 grain or heavier loads for the best performance. Enjoy.