My 70 year old eyes don't see the sights very well either. On other(shorter) guns I use either peep sights or a scope. I thought that would be the case on the BP rifle, so I hunted around and found one of those ladder sights that T/C used to sell. Then I figured out that the stock front sight was not tall enought for it and hunted down one that was. The front sight dovetail was too wide so I started filing it down and narrowing and shaping the blade. Then I got my glasses changed and went with the "no line" bifocals. I can now see the stock sights on the Investarm so I quit filing. I think I will mount the ladder sight one day tho, it looks like it should be way more accurate then the stock sights. Gotta go skype my son. He over in the sandy drawing combat pay.