Foxtrot Mike Products Ultra Light Free Float Handguard - M-LOK - Gen 2 - 10.5"

Manufactured by Foxtrot Mike Products
SKU: FM-5.56-10.5ULHG
MPN: FM-5.56-10.5ULHG
Manufactured by Foxtrot Mike Products
5 Reviews

Out of Stock

NOTE: Limit 5 per household. Quantities exceeding 5 will not allow checkout.



Free float handguards offer many improvements to the standard two-piece Mil-Spec AR-15 handguards. They reduce pressure on the muzzle end of the barrel which increases accuracy, offer more customization in terms of accessory mounting options, and come in many different lengths and profiles. The Foxtrot Mike Products FM-9 Ultra Light handguard features a slim profile with M-LOK attachment points along the full 10.5” in length. It is machined from 6061-T6 aluminum and has a type III hardcoat anodized finish for excellent corrosion resistance. This AR-15 free float handguard is compatible with all Mil-Spec upper receivers and most low-profile gas blocks, so you have the freedom to build your rifle the way that you want. It is easy to install with the included proprietary barrel nut and eight hardened steel screws to ensure that it won’t loosen over time. This M-LOK handguard also has a full length picatinny top rail that mounts flush with M4 flat top upper receivers to give you more mounting space for scopes, red dots and iron sights. If you are looking to upgrade your current carbine or build a new one, you can’t go wrong with this FM products AR-15 handguard.

  • M-LOK compatible at 3, 6, and 9 o’clock positions for lights, grips, bipods, and other accessories
  • Single piece free float design that is lightweight and durable
  • Machined from 6061-T6 aluminum
  • Mil-Spec hardcoat anodized black
  • Light and slim profile for increased ergonomics and comfort
  • Includes proprietary barrel nut
  • Full length picatinny top rail
  • Barrel nut requires 1 3/16 wrench (30 MM)
  • Made in the U.S.A.

Feature rich, high-quality, and affordable, Foxtrot Mike Products offer cutting edge solutions utilizing the highest quality materials and manufacturing processes available.
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Accessory AttachmentM-LOK
FinishAnodized Black
Gas System LengthExtended Mid-Length
Handguard Length10.50 in
MaterialAluminum - 6061-T6
Weight9.5 oz.

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

5 reviews

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Super light and slim, great price


We had already built a couple using them, I like the new design. The customer service is the best. There are install instructions on the FM web site and the rail came with shimms too. Nice touch. Cant believe how slim these feel in your hand and very ligh too. Cant beat the price, no complaints.


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Awesome rail for the price. Well made and super light and thin

Great budget rail!

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I was super hesitant to buy this rail due to how inexpensive it is but this rail is great! Super lightweight and durable. I'm have 900 rounds through this on an 11.5" 5.56 build and it's still Rock solid. Can't go wrong with this budget rail!

Great product - but, read the installation instructions

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First time buyer of Foxtrot Mike products. I bought this to go on a pistol build. I used standard barrel nut torquing, and split the barrel nut. Do yourself a favor - go to the website and read the instructions.
<br>I spoke to Primary Arms about a replacement; they said they'd talk to Foxtrot Mike. A few days later after hearing no update, I spoke directly to FM. They said they'd send me a replacement. A few days later, the replacement arrived, I installed, and the handguard works great. A few days after that, a second barrel nut arrived...
<br>So, kudos to both Primary Arms and Foxtrot Mike for their customer service. Now, I need to make arrangements to send the second barrel nut back...
<br>From PA: Sorry for any confusion, please feel free to keep the extra barrel nut in case you need it later.


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Very impressive rail at a very attractive price point. Centers the barrel perfectly and lines up with the upper pic rail perfect as well. Rock solid mounting. Fine finish with nothing sharp. I did have to use .025" of shims to get the barrel nut to clock correctly and within the normal AR spec torque range. FM should include a paper copy of the installation instructions that are on their website. They don't specify a torque setting . . just tighten until the nut clocks correctly for the mounting screws. I tried and it was way too little torque or way too much, hence the shims to get 40 ft/lb or so.