YHM’s new line of sRx products were designed with aesthetics and ease-of-use as the top priorities, and that is no different for the YHM sRx Muzzle Brake (YHM-4405-MB's). This Q.D. Muzzle Brake comes in two variations (1/2 x 28" & 5/8 x 24") and it's compatible Q.D. Adapter/Mounting Interface attaches to the industry standard (HUB) 1-3/8” x 24 threads. It features an internal taper seal-in front of the threads-that locks your suppressor on and forms a tight seal to contain gasses while in-use. This means no gasses or debris can build up on the threads.