First one owned - OpticsPlanet Exclusive Strike Industries Micro 9mm QUAD V Threaded Compensator

bought 2 of these, wish I hadn't bought any. It does a good job of reducing muzzle flip, however it stops the gun from cycling. I tried these on 6 different pistols, non will cycle with this comp installed. trying to find reduced recoil springs to get pistols to cycle a nightmare. spent hours online searching for springs.No luck. I think if a Manufacturer makes things like this, they should either provide reduced rate recoil springs for sale, or have a list of providers for such. These comps were a waste of my money and time.