Low Pro RIGID M-LOK Rail 13.5"

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Griffin Low-Pro RIGID rails are a slim, low profile, ultralight, yet rigid M-LOK rail. Design objectives of this rail were to provide a slim, ultralight rail, with increased rigidity over similar weight and profile current market options. A custom extrusion provides significant internal reinforcement to reduce flex when gripping the carbine firmly in the shoulder pocket. Understanding the importance of low light targeting, these reinforcements provide rigid mounting for IR laser aimers ensuring minimal POI shift when torque is applied to fore-grip type accessories, or when loads are applied to the rail (shooting off barricades, loaded bipods etc). Internal testing showed 70% less POI shift with laser aimers versus competing "slim rails". Carefully positioned slots in the rail allow for rapid cooling when running the carbine fast while maintaining rigidity.

The Low-Pro RIGID rail features a lightweight 7075 T6 Aluminum barrel nut, which can be installed with any car stock wrench or by using the included Griffin Armorers Wrench. Included shims allow barrel nut timing and keep the rear section of the rail low profile and ergonomically pleasing for relaxed posture carry at static positions. The included 17-4 stainless steel anti rotation QD sling swivel sockets install through the rail using a standard QD sling swivel (not included) and into the nut, ensuring that the rail is kept as low-profile as possible. In the same way, flat socket head cap screws are used in keeping with the sleek design objectives.

M-LOK slots at the 3, 6, and 9 o'clock positions allow for mounting of your favorite M-LOK accessories.

  • Length: 13.5"
  • Height 2"
  • Internal Diameter 1.35" (measured from inside of reinforcement spars)
  • Width: 1.54"
  • Weight: 9.2 ounces
  • Weight Installed: 10.52 ounces

Rail Kit video is posted below. To receive included items in this video see our rail Kits.

  • Low Profile M-LOK interface
  • Internal ribs provide increased strength to weight ratio
  • 6061 T6 construction
  • lightweight 7075 T6 barrel nut
  • Low profile integrated 17-4 nitrided anti rotation QD sockets
  • included Griffin Armorers wrench
  • Included shim set, mounting hardware, and threadlocker

Additional Details

Gas Block and Furniture Included?:
Type Of Part:


2 Reviews

  • 4
    Damn Good handrail

    Published by Cody on 12th Aug 2020

    So i felt this rail on one of their rifles a few months ago and had to have one for my next build. Well i can tell you this is my favorite hand guard by far. It feels very good in my hand, is slim with a full rail on top and all the room to add more. easy to install and the add tools is always a bonus. Now why only 4 stars? well mine was NOT milled for the two QD screws near the base. My guess was it just missed the machine so it what it is. Other than that gripe I will be getting more of these rails for future builds.

  • 5
    High quality product!!!

    Published by Preston Bolan on 15th Aug 2018

    Very well made product. Had a very nice feel installed. Will be getting the shorter version for sbr build. Overall I was very satisfied

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