All my pistols are SA/DA. Won't ever happen. About 25 years-ago, a cop north of where I live, shot himself with his Colt. He had it cocked and locked, and the safety got moved during the daily routine. Un-holstered it and shot his foot. Too casual=ND. I carry my pistol with one in the pipe, de-cocked, and have trained to pull the hammer back while drawing it out of the holster[it can always be shot 1st round/DA]. I shoot 1-2 times a week, and shoot for effect/Mozambique, not target-shooting.
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This pistol has been a perfect carry for me. HK USPc-40. I added the "Big-Dot"/tritium from sight, milled a rear sight to my preference, factory HK- "Match" trigger-kit installed[light SA/DA and hammer], and Magna-Ported.