G4 G17 with almost 27,000 flawless rounds of all kinds fired by many people with the old style ejector still in the pistol. I use Weapon Shield CLP and lubricate with Mobil 1 20W50 before ever firing a new pistol and after every use. I have fired several other G4 Glocks with zero issues as well. I suppose I am one of the 99% plus that received one GTG out of the box. Wanna kill these ads? We can help!