Adjustable sights can be moved with just a small screwdriver, and you can easily make incremental changes. Despite their name, fixed sights can still be adjusted, though they require filing or welding, and drifting with a hammer and copper punch, to adjust. Fixed and adjustable sights are referred to generically as “iron” sights. Sights come in three types fixed, adjustable and optical. Check out these tips to adjust the iron sights on your fixed-sight pistol or revolver. Iron sights on handguns remain a durable and cost-effective option. Done right, this won’t come off short of a hammer. This is an old-style front sight, properly staked onto a 1911 slide.