Williams Gun Sight Company STRONGLY recommends that this product is installed by a professional gunsmith
These fiber optic sights will make your buddies jealous the next time you go to the range with your Ruger® MKII™, MKIII™or MKIV™ with a Bull Barrel. The sights collect surrounding light rays to offer you superb visibility, even in dark conditions. This Fire Sight set from Williams Gun Sight Company features bright green fiber optic dots on the rear sight and a bright red fiber optic front dot that will give you a crisp, clear sight picture. These replacement sights will help speed up your target acquisition and improve your accuracy.