Fortis NIGHT Free Float M-LOK Rail System

Fortis NIGHT Free Float M-LOK Rail System

Product Code:
Calculated at Checkout
$204.20 - $261.20



  • 2-piece barrel nut that provides 360-degree contact
  • Free float rail design
  • M-LOK attachment points
  • No visible screws on the rail system
  • Barrel nut and mounting hardware included

This Fortis NIGHT Rail is the M-LOK Model, if you need the KeyMod model, please check out the Fortis NIGHT Free Float KeyMod Rail System.


  • Material:
    • Rail: Aircraft Grade 6061-T6 Aluminum
    • Barrel Nut: 4140 Steel
  • Finish: Mil-Spec Type III Hard Coat Anodized
  • Height: 2.35"
  • Width: 2.25"
  • Internal Diameter: 1.35"
  • Weight (with barrel nut):
    • 10-Inch: 12.2 oz.
    • 12-Inch: 12.9 oz.
    • 14-Inch: 13.9 oz.
    • 16-Inch: 14.6 oz.
  • Actual Length:
    • 10-Inch: 10.5"
    • 12-Inch: 12.875"
    • 14-Inch: 14.437"
    • 16-Inch: 16"


  • Mil-Spec AR-15 upper receivers


  • 1x Fortis NIGHT Free Float M-LOK Rail System
  • 1x Two-Piece Barrel Nut
  • 1x One-Time Use Barrel Nut Wrench
  • 2x Installation Pins
  • 1x Locking Insert
  • 1x Locking Insert Retaining Screw


If you want a lightweight, American made handguard for your AR 15 that offers you a variety of mounting options for your accessories, the Fortis NIGHT Rail is the perfect fit for your build. This handguard performs flawlessly and brings a refined look to your rifle that other handguards just can’t compete with. The Fortis NIGHT Rail is available in 12 and 14-inch lengths to fit your preferred barrel length.

Thanks to Fortis MFG’s obsession with innovative design, the Fortis NIGHT Rail brings you everything you need in an M-LOK rail system. The handguard not only provides the protection you need but also extends your top rail’s usable mounting space to its full 10 or 16-inch length. Add the convenience and speed of M-LOK rail mounting slots to the package and you have a superior product that offers protection, all the mounting options you need and looks great doing it.

Fortis leaves nothing to chance, their patented barrel nut and NIGHT rail are supplied complete with the tools you need to properly complete the mounting process. Fortis’ supplied wrench mounts directly to your torque wrench and common breaker bar. After timing the barrel nut assembly and properly mounting it simply slide the handguard into place and use the included tightening pins to hand-tighten the forward portion of the barrel nut completing the installation process.

The Fortis NIGHT Rail handguard installs simply, yet the cutting edge design of Fortis’ two-piece barrel nut system creates a secure 360-degree mount contact that ensures a true free floating mount that won’t give in under pressure. It might seem a bit over the top, but the machining process of the barrel nut system takes nearly as long as that of the rail body itself. Fortis Manufacturing designed this system from the ground up to create a product that performs above and beyond industry norms.

Write a Review

10 Reviews

  • Fortis Night Rail

    Posted by Cayden on 5th Nov 2020

    This rail is better than I expected! Very solid rail and a very unique look. I choose this rail for my 1st build and can't wait to put is all together!

  • Fortis Night Free float M-Lok rail

    Posted by Burnett Grant on 16th Sep 2020

    Great Rail. Very different. Looks great on any rifle or pistol

  • Fortis Night

    Posted by Burnett Grant on 16th Aug 2020

    Great Rail, Great Price, easy process. Thanks for veteran discount.

  • Fortis Night Rail Looks Amazing

    Posted by Jake on 4th May 2020

    This is my third Fortis Rail and it is just as amazing and the previous. The integrated barrel nut and hand guard mount is very cool and easy to work with. Craftsmanship is amazing!

  • Bad ass

    Posted by Unknown on 10th Sep 2017

    Perfect product for my at build. Fit great and looks even better.

  • Design flaw and won't hold zero.

    Posted by David Greenberg on 6th Sep 2017

    The handguard slips to the left and to the right just slightly enough to throw off you zero. The handguard uses a retention that keeps it from falling off yet does not secure the handguard from rolling left to right. It has a small amount of play that is enough to throw your zero off when you use your back up sights. I have tightened the main bolt with the 2 steel rods that are provided and I really cranked down on them and finally it may stay in place, but the question is for how long??? Also there is a warning to not over tighten this bolt or you may damage the handguard. Well there is no way you can measure hand strength so what's too much and not enough. Hopefully I found that, Anyways I'm not willing to gamble on that when or if I ever have to use it to defend my family or myself. I'm putting it on ebay and buying the Odin Olight like I should have in the first place. Okay so you think I just may have done something wrong, so I had a gun smith look at it and he felt the same way I go about this product. Bad idea and bad concept to hold the handguard to the rifle. Hope this helps anyone planning on purchasing this product. Initially I had given this 5 stars, that was before I had some time to shoot my AR a few times at the range. It just works itself loose.

  • Great Hand Guard

    Posted by Rog378 on 9th Jan 2017

    Very unique, high performance design. As always, make sure your gas block will fit, especially if you are using a heavy target bbl. Also, make sure you are careful when you tighten the handrail ring to not scratch your bbl when using the tightening pins provided.. and the provided bbl nut wrench works great. The bbl nut ring needs to line up with the gas tube opening on your lower and the gas tube will need line up with your gas block. So torque your bbl nut with that in mind. Check clearance on adjustable gas block to maintain free floating quality.

  • light weight awesome look

    Posted by Unknown on 31st Oct 2016

    fortis night rail is feather light looks awesome super solid when mounted multiple quick release sling mounting points some forends are cheaper and some cost more but for a specific distinctive looking build this one was perfect for me

  • awesome !

    Posted by Unknown on 1st Sep 2016

    Makes one good looking AR 15

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