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Question on S&W M&P rifle?

1281 Views 15 Replies 7 Participants Last post by  spikesfan
I am having problem with some mags not allowing the bolt to lock once empty. This only seems to happen on some mags. I was told to change the plates out inside the mags. I am not sure why some work and some dont. Thinking of going to Magpul mags. Any ideas?
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i use all magpul mags with the exception of one and it is a factory steel colt mag... no problems here.
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