Now your choices are limitless! Get the full fun factor out of your firearm by mounting any 1/2-28 TPI end-of-barrel accessory such as a muzzle brake, flash suppressor, compensator, sound suppressor or any other legal thing you like. The M9 x .75 to 1/2-28 Thread Converter (also known as a muzzle nut muzzle coupler or muzzle coupling) from Tacticool22 allows you to mount standard end-of-barrel accessories such as flash hiders, recoil compensators, or unrestricted FAK