Fix: Empty Pmag gen 3 doesn't catch/lock bolt

AR platform is new to me, and I hope I don't upset anyone here because I am a noob when it comes to ARs. I recently assembled this Noveske rifle and bought 3 pmags M3 only to realize that most of the time the bolt wouldn't lock back on an empty mag.

I then found a solution to the problem. Very simple to fix if you are having a similar problem. Of course not everyone has the same exact issue.

When the bolt is closed, the bolt stop lever is prevented from raising by the bolt sitting above it. My brand new pmags had casting burrs on the inside of the body where the back of the follower, that also had a burr would snag.
So, I assume that if you just emptied your mag, the follower is snagged on the burr, and the bolt stop is kept down by the bolt. The bolt comes back, the follower doesn't move up (because of the burrs) and doesn't raise the bolt stop - the bolt slams forward even though your mag is empty.

Same thing happens when you insert an empty mag. The bolt stop was down, kept by the bolt above it. The bolt stop presses down on the follower as the empty mag is inserted. the follower catches the burr of the mag body, and doesn't come up. Bolt is pulled back, but the follower is not pushing up on the bolt stop, so the bolt slams forward when you release the charging handle.

This is what I believe is happening and removing that pesky burr solves this issue, although i haven't fired this rifle yet and cannot know for sure.

Let me know if I am completely wrong here.