I'm sure everyone is aware of the plethora of problems experienced by owners of gen 4 Glocks. I have two gen 4 G17s, one with 2675 and one with 2475 rounds through them without a single issue of any kind save a couple of brass to the face (BTF), and that could have been bounces off the shooting booth wall. I've had the occassional BTF with other brands as well, sooooo....
But, what prompted this inquiry, it seems the BTF issue is still a problem with some G19/17 gen 4 models, but it appears to be only in some guns. And, there seems to be a new twist to the problem - everything works fine for the first 1000 - 2000 rounds and it's at that round count the problem starts to show up. Hence the significance of the round count through my gen 4s - they appear to be past the threshold. Then again, I may be getting closer and closer to the problem developing.
The source of my info is a 6 page thread (current time frame) about the problem on GlockTalk. I really thought this problem had been solved, but it would appear the problem may not show up on some G19/17 gen 4 guns until the 1000 - 2000 round mark.
The problem guns appear to be 100% reliable as far as FTF/FTE issues go, so the BTF doesn't stop the gun from running, but it could stop the shooter if he wasn't wearing glasses.