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Fortis Night Rail 556mm Free Float M-LOK Rail System (Options)

  • When designing the Night Rail™, we wanted to design a handguard that was easy to install, but also to be able to mount with a full 360 degrees of contact.  Our new patent pending, two piece barrel nut is one of a kind. We developed it from the ground up and the machining time it takes to make the barrel nut, rivals the time making the actual rail. That's not to say the rail is simple to make. One look and you'll see that we really took time with this in design and development. What we ended up with is a rail that not only looks amazing, but is still true to our lightweight brand.  The barrel nut/mounting system keeps the rail performing even during the harshest of conditions.

    Being one of the leaders in the industry of rail innovation and design, it's always a challenge to innovate new products that function well, but look great also. We're up for the challenge with the next chapter of our product line - the Night™ Series. I think you'll agree that we hit a home run with the Night Rail™.


    • Material: Aircraft Grade 6061-T6 Aluminum / Barrel Nut: 4140 Steel
    • Proprietary, patent pending 2 piece barrel nut that provides 360 degree contact
    • Free float rail design
    • MLOK™ attachment points
    • No visible screws on the rail system
    • Will include (throw away) barrel nut wrench to install
    • 10": 8.3 oz / barrel nut 3.9 oz
    • 12": 8.9 oz / barrel nut 3.9 oz
    • 14': 10 oz/ barrel nut 3.9 oz
    • 16": 10.7 oz / barrel nut 3.9 oz
    • 10": 1.35" Internal Diameter / 10.5" length
    • 12": 1.35" Internal Diameter / 12.875" length
    • 14" 1.35" Internal Diameter / 14.437" length
    • 16": 1.35" Internal Diameter / 16.0" length
    • Made in the USA!
    • Night Rail™ Instructions - CLICK HERE for PDF
    • Installation error and damage caused during installation is NOT covered - please read instructions carefully as well as watch our installation video (See Specifications Tab). If you have ANY questions, please contact us.


  • Manufacturer Part Number: NTR-12-MLOK/ NTR-14-MLOK
  • The MSR Arms Advisor articles are intended to answer some of the most common shooter questions and assist our customers in making the best purchasing decision possible.
  • No questions have been submitted regarding this product. If you have a question regarding this, or any of our other products, please submit them by emailing We will return your email promptly and post both the question and answer here for our other customers to view. Remember, there are no dumb questions... Thank you, MSR Arms

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