The instructions say to put a little dab of locktite or nail polish to keep the screw from jumping out. I have yet to take it to the range due to workin 100 hrs a week. But hopefully this weekend I'll be able to go.
I found that WWB 9mm would not cycle my 17L with the Lone Wolf barrel and comp. I had to replace the stock 17# spring with a 15#. I also had to bump up the charge to get the gun to cycle properly. If you don't reload you may need to buy the +P ammo.