This compensator works well - ZEV Technologies PRO Glock V2 Compensator

This compensator works well BUT on my Glock 19x, even with a 15lb recoil spring, it only wanted to cycle really hot ammo. That being said, it took some of the bite out of what I was shooting and as long as I kept feeding it Winchester active duty 115 grain, it worked flawlessly. Also extremely easy to install. I don't understand how any of these other reviewers had issues with installation. Screw it on until it stops then unscrew it one full rotation plus whatever else you need to get it straight and then tighten each bolt to NO MORE than 30ft/lbs of torque. I just tightened it hand tight and then did a 1/4 turn on each bolt. It hasn't come loose at all after hundreds of rounds. Pretty sick if you ask me.