Shop › MIDWEST M-LOK 9 SLOT RAIL SECTION MIDWEST M-LOK 9 SLOT RAIL SECTION $21.95 Midwest Industries M-LOK 1913 Milspec Rail Section, 9 Slot, M-LOK compatible, Black MI-9MR Quantity: Add To Cart Added! Midwest Industries M-LOK 1913 Milspec Rail Section, 9 Slot, M-LOK compatible, Black MI-9MR