Projects Setting back a 22lr barrel on a lathe, to correct extreme headspace. Common source of misfire or intermittent misfire on old rimefire rifles. Disassembling Ruger BlackHawk for drilling/extracting broken screws Upgrading trigger controls and replacing 16 contour barrel with stainless target barrel. Replacment Fiber Optic sights are great for the Iron Sight lovers who may be having a harder time seeing. Target rear sights are an inexpensive and fun way to upgrade your target skills.