Backup Tactical Compensator, 9MM, Black, Fits 1/2X28 Glock Gen 5 GGEN5COMP-BLK The PROComp from Backup Tactical is a high-quality muzzle device made of precision-engineered aluminum with a sleek black anodized finish. It can reduce recoil by up to 60 percent and is designed to fit perfectly on the Gen4 and Gen5 Glock 9mm pistols will fit All Double Stack 9mm Glock Pistols like the 19" 17" 19x" 45" 26" 47 and related variants.