I found a nice GRA laser pistol but can't use it because when I right click to aim it moves the pistol to the center of the screen and I can't see what I'm shooting at. The normal laser pistols do not do this. Is there any way to turn that off? I'd really like to see what I'm shooting at lol!

Turn off true iron sights I guess.

I did but that doesn't fix it for GRA weapons. Only vanilla

Well, there is always the combat sights upgrade.

That is about all you can do to solve the problem.