Shop › FORTIS NIGHT RAIL 556 10" MLOK BLK FORTIS NIGHT RAIL 556 10" MLOK BLK $204.20 Fortis Manufacturing, Inc. Night Rail, Free Float Rail System, Handguard, 10", M-LOK, Fits AR15, Black NTR-10-ML Quantity: Add To Cart Added! Fortis Manufacturing, Inc. Night Rail, Free Float Rail System, Handguard, 10", M-LOK, Fits AR15, Black NTR-10-ML