I am a believer in if it isn't broke don't fix it. My M&P's didn't take thousands of rounds to get there either....several boxes of ammo and the differences are amazing.
Have I fired an M&P with a kit....yes I have. Not much difference between my friends gun with a kit and my M&P .45 that had 200 rounds downrange.
My .40 FS M&P with 15K through it is used in USPSA/IDPA matches and my comment was that with that many rounds it is still getting better instead of feeling like it is worn out.
Randy
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