Bought a Ruger MK III (.22 target) a few months ago because I like to shoot a lot and I'd rather pay 3 cents a shell rather than 25 cents per for my Glock 9mm.
Went to indoor range first time out and had difficulty sighting with stock Ruger black, adjustable sights. Went home and painted front sight and small grooves on rear of rear sight. Back to indoor range. Still couldn't see well.
Online found Williams Gunsight Company and ordered MK III fiber optic sight (orange front; green rear).
HIGHLY RECOMMEND THESE SIGHTS!! Great indoor and outdoor.