Our 9mm compensator reduces vertical rise while firing. Through rigorous testing, we developed this compensator with a single upward vent to redirct the minor gasses from 9mm, and help you stay on target during firing. Many different muzzle devices do little more than weigh down the front end of your firearm, whereas we designed this compensator to be lightweight and functional. Threaded in 1/2-28" with an included crush washer, this compensator is a perfect choice for the EP9 or any 9mm PDW.