I know the newer m&p's with the frame safety "mold cutout" and redesigned sear block are sans frame plug, but did any of the older m&p's(full size or pro) ever come without the frame hole and plug?
I know the newer m&p's with the frame safety "mold cutout" and redesigned sear block are sans frame plug, but did any of the older m&p's(full size or pro) ever come without the frame hole and plug?