I have a 9pro in 4.25" If I was going to buy it specifically for competition, I'd probably go with the 5" since the sights seem more competition oriented than the night sights on the 4.25" pro.
I bought mine as more of a multi purpose gun so the shorter barrel and night sights were a plus to me.
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M&P .40, M&P 9c & Shield 45
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