I have a 16" POF Upper on a Bushmaster Lower. It now fails to eject at least three-times per mag. It was pretty low maintenance for the first year or so. I loved the design except for how hard it is to remove the gas piston.
I have been emailing POF about it and they blame my use of surplus ammo and asked about the extractor.
Others have said that it might be due to using M4 hand-guards and not a more open rail system.
It seems clear to me that it is not the extractor but the bolt failing to cycle fully. The empty casing is being extracted, but the bolt is only cycling far enough to get bend the firt round without ejecting the casing. Basically it is stove-piping the casing while trying to load the next round.
If it's the hand-guards or the ammo, then this isn't the weapon for me.
No Direct Impingement system I have owned or been issued has ever given me any reliability problems. Many of them have undergone much more abuse as well.
Maybe I am cleaning or lubing it wrong? My practice has always been to keep the weapon as dry as possible (light coat: barely oily to the touch) and to avoid lube completely on gas pistons.


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