SDI Hammer-Fired Pistols (FTH 223) Practice Test

Power-tools are avoided in gunsmithing because precision and delicate tolerances matter, and power tools can compromise both. They remove material rapidly and with less tactile feedback, making it easy to overshoot, misalign parts, or alter critical engagement surfaces. The heat and vibration produced can warp or anneal metal, affect heat-treated components, or leave burrs and finish damage that impair reliability and safety. Even small dimensional changes can alter trigger pull, sear engagement, timing, or fit of components, leading to unsafe or unreliable operation. Therefore, hand tools, controlled fixtures, and careful measurement are preferred to preserve integrity and function. There are rare, highly controlled cases where machinery is used by skilled professionals, but the general practice is to avoid power-tools to prevent damaging components.