Fitting grips. Its well within the grasp of a normal person, if they have the 20 hours to learn. Not related really, but you reminded me with "hack", if you ever see an SKS shortstroke, and there are a lot that do, a paperclip is the right size to fit in the gap between the gas port, and gas tube. Works great on rifles that have been rusted out from corrosive ammunition. Also, all 1911 people should read, research, and understand all of the legendary 1911Tuner posts. Maybe then all those people that make excuses at the range can actually shoot at the range.