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Rainier Arms, LLC

Rainier Arms Night Rail System M-LOK - 16

Rainier Arms Night Rail System M-LOK - 16

Availability: In stock




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 this 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 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, and 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 homerun 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
  • No visible screws on the rail system
  • Will include barrel nut wrench to install
  • 9.2 oz / barrel nut 3.9 oz
  • 1.37" Internal Diameter
  • Made in the USA!

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length 16"
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (1)

No commentReview by
Love the look of the Night Rail! Haven't had the completed build to the range yet so I'm hoping that it performs as well as it looks. I read a review after I purchased and installed the rail where the user stated that after firing a few rounds the rail would slip away from the upper receiver not matter how much he tightened the second piece of the barrel nut.

Installation not so great. The barrel wrench that comes with the rail is a P.O.S. - it bent and stripped while tightening the barrel nut to the manufacturer's torque specification. The wrench needs to be twice as thick or of better quality metal (like Geissele's). Thankfully it didn't mar up the visible part of the barrel nut that bad when the wrench stripped out.
(Posted on 9/27/2016)

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