It works about maybe 50% of the time. Many times the shell will get caught half in the chamber and the catch net causing the next shell to jam. this happens esp bad when you pump and shoot fast. I just finally took it off since the shell jams are a real PITA to clear. you have to take the trigger set out to clear the jam. It was just not worth the effort since this happens a lot. The solution would be if they made the catcher opening bigger (wider) and make the top part extend out more from the feed and this would allow the ejected shell to fall in the net and not get caught up.