I wanted to put this in here because the parts are great for reloaders. The comp keeps the slide speed down and the brass much closer, even w/ the stock recoil spring. The mag extension is there just to add some weight to the butt of the gun, not so necessary but it does help it balance as the mag goes empty. Anyway, take a look on the exchange, and a gratuitious pic just for fun... Wanna kill these ads? We can help!