My dad has a T/C Renegade with adjustable sights. The front sight is a big blade with a ball shape on the sight picture itself. What he doesn't like about it is at 50 yard bench shooting the target sticker is covered by the size of the front sight. What I am wondering is if there are replacement primitive fixed sights for it or maybe buckhorn sights. I was also wondering if it is hard to replace sights on a gun. Any help or suggestions would be appreciated.