Recently my son purchased a 10/22 and we are having some issues with the front dove tail sight. Is it normal to really have to hit that thing so darn hard to get it to move so darn little? I have a brass punch and hammer and can't even tell if its moving. I'm worried about hitting so hard that it going to break something. Any thoughts on this? Actually, I'd like to pop it out and replace it with a fiber optic.