Easiest upgrade on the market - Meprolight Sights for Walther Pistol Models

As the title suggests, this is the easiest upgrade possible, only tool needed is a small screwdriver. Depress the retaining detet and the old sight slides out. Observe the position of the sighting screw, remove from old sight ant insert to the same depth on the new sight. Re-insert the sights on the slide with the detet depressed. This will return the sight to approximately the correct position.