Shop › FORTIS NIGHT RAIL 556 16" MLOK BLK FORTIS NIGHT RAIL 556 16" MLOK BLK $265.95 Fortis Manufacturing, Inc. Night Rail, Free Float Rail System, Handguard, 16", M-LOK, Fits AR15, Black NTR-16-ML Quantity: Add To Cart Added! Fortis Manufacturing, Inc. Night Rail, Free Float Rail System, Handguard, 16", M-LOK, Fits AR15, Black NTR-16-ML