For those of you that have purchased the new 40 round magazine.......what are your thoughts. I took the one I have to the range today finally and I had a couple of minor issues. The mag would not lock into the mag well unless the bolt carrier was locked back. You could see that is was pushing the mag release back just a bit when you inserted it but not enough to catch it and lock it into the mag well. I also noticed that with the mag inserted that it was a bit loose and you could wiggle it around a bit in the mag well. I have some other new M3 30-round PMAGs that I haven't used yet and will see if they do the same thing. Other than these couple of minor quirks it seemed fine. I only had time to run 40 rounds through it

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M&P15 Sport,9Pro,9c,Shield9,45