Mega Sports does not do any gunsmithing or other work on guns. They do have a few people that work at the store that are Glock Certified Armoers but the store itself does not do any work on any sort of gun. The same goes for Rink's in Lockport. I would suggest going to a Gander Mountain store. To the best of my knowledge they all have gunsmiths, armoers.
What eactly do you need done?