Shop › MIDWEST M-LOK 3 SLOT RAIL SECTION MIDWEST M-LOK 3 SLOT RAIL SECTION $17.95 Midwest Industries M-LOK 1913 Milspec Rail Section, 3 Slot, M-LOK compatible, Black MI-3MR Quantity: Add To Cart Added! Midwest Industries M-LOK 1913 Milspec Rail Section, 3 Slot, M-LOK compatible, Black MI-3MR