I hope you have better luck than I did with my replacement Shield .45.The first gun had problems with the slide locking back and magazine dropping out( Slide 17 times in 340 Rounds).I sent it to S&W 3 times , they said it was unrepairable and would send me a new gun. On August,18 the replacement gun arrived at the FFL dealer from whom I had purchased the gun. I went the same day to the range and the Slide locked back 3 times in 123 rounds. Decided to go home , clean the gun and try once more.The slide would not come off the frame,finally gave up and went back to the Gun store to see if they could get it off.They could not get it off either,finally got it off ,but then could not get it back on. To make it a short story,traded it for a Glock 30S. Very disappointed and frustrated with Smith&Wesson. Good Luck!

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Grumpy