Please let me know if anyone has any suggestions on how to straighten this canted grenade launcher sight.  Is it a matter of turning the pin on the left side of the sight or will using a rubber mallet to try to knock it in to place work.  Since this controls the gas I want to be careful what I do.  I also wanted to run this buy you guys first before doing something that can't be undone.  Thank you in advance for your input.

Rubber hammer

From the second pic it looks like it's bent down near the base. It'd probably be better to remove the sight from the gas block to straighten it.