I just purchased a gen 4/ 23. I have read many posts stating FTF, FTE, stove pipes... I am glad to say, the first 100 rounds have been flawless. The trigger could be better, but I guess a 3.5 lb connector should fix that. The only other thing I noticed was the brass was flying everywhere. Three of them hit my hat, maybe need to swap out the extractor...any thoughts. Other than that, the 23 is awesome.