The revolutionary McLearn Custom Guns 13-5 Compensator was designed and developed by Matt McLearn himself. Narrow top ports allow a much greater side port wall thickness, creating more surface for high pressure gasses to deflect on. Having the side ports with a reverse angle also create more surface area and rearward deflection of gasses, giving the gun a much softer felt recoil. 5 top ports keep muzzle down for faster split times. Elongated chamber through holes, allows gasses to work through the entire compensator. Made in the USA from 4140 steel that feature 11/16x40 thread.