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For her birthday present, my wife picked the S&W M&P Shield in 9mm. She tried several (mostly .380s) But when she gripped and aimed the Shield, she exclaimed, "That's it!"
Took it back to our range -- and the trigger pull was so hard, I honestly thought I'd left the safety on!
After several evenings of careful stoning and dry-fring it with 3M "Finesse-It" polishing compound on rough spots, it smoothed out, and lightened up -- and it now has a nice trigger pull.
It now shoots just fine, and I must admit that I enjoy shooting & carrying it -- even if doing so makes my HK P7 a mite jealous... '-)
Mine has an excellent trigger pull, 3 lbs?
Small and light, compact, positive safety.