Backup Tactical Compensator, 9MM, For GLOCK 43X/48, Threaded 1/2X28, Black G43XG48COMP-BLK The PROComp from Backup Tactical is a meticulously crafted aluminum muzzle device with a sleek black anodized finish. It is designed to perfectly fit on Glock 43X/48 9mm Gen4 and Gen5 pistols. With its superior design" this high-quality accessory significantly reduces recoil by up to 60 percent.