I wouldn't call it a blanket fix, the new springs are just making it to the users IIRC. I guess I'm lucky, although to be honest I can call 9 people off the top of my head with 9mm 4th gens that have had no problems at all(under a few FTE's in more than 1K rounds). 7 of them are also cops who put decent rounds through theirs. The one Gen 4 I have personally seen that has had problems was also a guy who replaced striker spring, connector, RSA, and lightened his trigger. Even that problem was just light primer strikes that was fixed by switching back to stock.
The GFA is just an add on for the Glocks that changes the grip angle and gives it a beavertail. It was an instant improvement for me.
http://shop.gripforceproducts.com/
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