I’m fortunate that I have a friend who has a machine shop in his garage and we can build just about anything. However, for guys who don’t have this luxury, it’s good that there are inexpensive aftermarket sights available.
I’ve always been a fan of the aperture sight for precise shooting over the conventional open hunting sight. A good aperture focuses the eye to make a better and more precise shot. Hits are what count and not near misses.
I like my peep sights, especially at twilight.
/johnny