Quote:
Originally Posted by Brian D.
UPDATE: I scored a second Pro Mag for my M&P--once again perfect fit and function at the range. Coincidence, or am I onto something good here?
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My experience has been that promag fit and function is fine but they use a weaker material for the spring and so they need to be stretched out every now and again, especially when you keep them loaded all the time. You can also rotate them from full leaving one mt at all times and the springs will last longer.