This thread adapter easily replaces the factory barrel nut and gives you the 1/2 x 28 male thread that you need to screw on a suppressor, a flash hider from an AR15 or an UNRESTRICTED fake suppressor. To install it, you don't have to modify your handgun or do any machine work. All you have to do is remove the factory barrel nut with the factory supplied wrench and then replace it with this adapter which will give you the 1/2x28 male thread in the front of the gun.