Failure to extract

This is a follow up review. Primary arms was great as always but this upper was very poor. A good upper should be able to shoot anything that goes in it in my opinion. My Daniel Defense does this without issue. I was given a lot of steel case ammo for free (I usually never use it)and again my dd ran all of it with multiple different bcgs just fine no matter how much or how fast i shot. This upper however does not. After about 40-60 rounds though it, it will fail to extract a spent steel case from the chamber and i have to put a rod down the barrel to pound out the spent casing. It runs brass case fine for the most part. If it can't shoot all kinds of ammo without hiccups though then it does not deserve more than one star in my book. Again, I am very disappointed and expected much better quality from spikes. Furthermore the upper/lower fit is terrible. It is paired with a spikes lower and the fit was awful. I am very very disappointed in this upper.