Bought a muzzle Brake for my PPQ 4TAC 9mm from Wing Tactical and wanted to let everyone know that it DOES NOT work. Shoot the first round and it fouls the ejection and won't chamber the next round. This is using the lighter of the two recoil springs supplied shooting 115g target loads. I contacted Wing Tactical and they suggested a 2lb lighter spring but no one makes one (including Wolf). To make a long story short they won't refund my money no matter how hard I tried so I now have a $44 paper weight! Beware the Wing Tactical!!