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Questions & Answers
Will this hand guard work on a sig sauer AR15 tread pistol? Expert Answer

Yes, the Geissele MK16 Super M-Lok 13.5in Modular Rail will be compatible with your Sig Sauer Tread. If this is your first Geissele rail, you will need to purchase a barrel nut wrench in order to properly install the rail. The Geissele Barrel Nut Wrench can be found linked below:
https://www.opticsplanet.com/geissele-barrel-nut-wrench-02-243.html

by Ethan, Gear Expert, February 7, 2023
What compensator will fit flush inside of the hand guard? Or recommended brand that’s compatible? Thanks Expert Answer

The Geissele MK16 Super M-Lok 13.5in Modular Rail has an internal diameter of 1.26". Meaning any muzzle device that does not exceed 1.26" in diameter will be compatible. A blast can like the Midwest Industries 5.56/.223 Aluminum Blast Can has an outer diameter of 1.2" and would be compatible. It can be found by using the link below:
https://www.opticsplanet.com/midwest-industries-5-56-223-rifles-1-2x28-tpi-3-375-inch-aluminium-blast-can-inc.html

by Ethan, Gear Expert, December 20, 2023
Customer Reviews
Helpful Positive Review
We got the DDC version for my wife's recce rifle. The barrel nut is designed well. Follow the instructions while installing, and what you'll get is an absolutely bombproof handguard. Plenty of real estate for addons, and fills the hand nicely. Allo...
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1/1 found this helpful
Helpful Negative Review
color way off by Justin, Verified Owner, March 16, 2024
Don’t like leaving negative reviews but this rail color was so far off I had to leave a review. I’ve watched numerous videos and see. Numerous photos of this rail and it’s your typical (ish) FDE color. I received my rail and installed it and it’s so ...
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1/17 found this helpful
Most Recent Reviews
Geissele 13.5in MK16 Super Modular Rail by johnchip, Verified Owner, November 12, 2025
First off, the packaging was completely crushed when I received it and it looked like it went through a tornado. Fortunately, the handguard was still intact but I was not happy to see the state of the packaging when I first got it. After using a can ...
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Most Recent Reviews
Geissele quality by FdeRob, Verified Owner, November 15, 2024
Great quality always received from geissele. Only issue is inconsistency with color. In the past always good, darker tone compares to burnt bronze now.
0/1 found this helpful
Most Recent Reviews
Quality product by FdeRob, Verified Owner, November 22, 2024
Very well made, just keep in mind shades can run from desert to bronze. If your good with that its a great upgrade.
Most Recent Reviews
Geissele Hand Guard by Alec, Verified Owner, June 13, 2024
Great hand guard, highly recommend and Optics Planet has fast shipping.
Read All 10 Reviews

Product No Longer Available

Unfortunately Geissele MK16 Super M-Lok 13.5in Modular Rail is not listed by OpticsPlanet.

Product Info for Geissele MK16 Super M-Lok 13.5in Modular Rail

The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated version of the proven Geissele Barrel Nut design, the MK16 is not only easy to install and maintain, but offers superior rigidity. Anti-rotation tabs and set-screws ensure that your rail will not rotate, even under the most extreme conditions of use. M1913 picatinny rail on top and M-LOK slots on every quadrant ensures maximum customization for all your accessories. The Geissele SMR MK16 is precision machined using 7000 Series Aluminum due to its strong, rigid and light properties, and is finished in durable Type-3 Hardcoat anodized.image

Package Contents:

  • Geissele MK16 Super M-Lok 13.5in Modular Rail
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