Thread: What would have this felt like?

Looks like a typical case head seperation from ecxessive headspace and / or to much resizeing. Thats the one you can feel with a unfolded paper clip down the inside of the case.
If you look at the case wall you can see that its not a clean cut but goes up on a bevel as the case kept being reworked.
Just my opinion It could be totally wrong.