I have not shot an M&P, but I have a Sigma in 40. I have a complaint with Glock and their trigger guard, that I do not have with the Sigma. I am not bashing the Glock, but it is not the one I would have.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
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Life Member NAHC