LOL...the only thing that I could determine from referencing that old thread was this:
1. Everyone has a wild ass guess to toss in
2. Proper spelling and usage of grammar was more prevalent
IMHO...it's probably factory junk that wasn't removed during assembly. I cannot see how it would do anything to improve gas flow or functioning.
The only thing that I could remotely think of was some sort of crappy attempt at laminar flow (which is more for fluids than gas anyways).
The only thing I seem to recall that was to be ADDED to a magazine body was a ball bearing from some Nine Ball high flow valves...and I wasn't even sure what that was supposed to do.