I've owned an SP101 in 9MM for several years now. The trigger pull is heavy, but smooth. I did try lighter trigger and mainsprings but got sluggish trigger return and failed to fire with harder primers. Went back to factory springs and all was well. If for EDC, I would leave the factory springs. Should you ever have to use your SP101 in a lethal force situation, you'll not likely notice a heavy trigger pull.........ymmv
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NRA Life, COTEP 640
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