Solid upgrade - Williams Gun Sight Ghost Ring Ruger Mk II, III & IV Bull Barrel Models - Fiber Optic Blade

Though the bar is pretty low, a great improvement over the factory MKIV iron sights. Make sure you order the proper set for your gun; notice the reviews complaining of POI way high or way low - read the manufacturer instruction on fitment. Do not attempt install without a vise and brass drift.
Very happy with fit and function. They work with a .22 suppressor.