mine kind of tilted to the side, it happens because of the bolt.
The detent goes in the bolt groove, which moves the bolt a little to accomidate for it, which turns the backblock slightly.
How to fix it? Get a derlin bolt without a groove, line everything up, and dremel a new groove in, this is actually hard as hell to do.
It doesnt affect preformance at all.
Getting out of paintball sale!