So I had a few failure to eject rounds yesterday and I am considering making to swap that so many have suggested in regards to a steel guide rod and a heavier recoil spring. I've done some shopping around but I'm a little clueless on what the good buys are and what my options are. Most seem to go with lone wolf so I'm guessing that's a good product? Also... am I limited to the recoil spring specifically for the gen3 or will the dual spring system of the gen4 work? All recommendations are appreciated...thanks Wanna kill these ads? We can help!