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Questions & Answers
How much length does the barrel nut add to overall length? Expert Answer

Please email us at techsales@opticsplanet.com regarding your question.

by Hunter, Gear Expert, September 22, 2022
Will the Bbarrel Nut fit over a 1.052" Bull Barrel? Expert Answer

The FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard only has an internal diameter of 1.294". You will need to use a low profile gas block. I would recommend measuring your setup to ensure fitment.

by Ethan, Gear Expert, December 1, 2022
Customer Reviews
Helpful Positive Review The notched fit at the bottom fits weird against some lowers by Jake, April 15, 2022
The notched fit at the bottom fits weird against some lowers. Other than that the fit and finish on all aero precisions handguards I’ve owned has been very nice. The locking mechanism is very easy to install and has no way of backing out on you.
1/6 found this helpful
Helpful Positive Review One of the easier barrel nuts I've used by Jonathan Smallwood, Verified Owner, July 5, 2024
Easy enough to install. Used with a 9 inch barrel and it tucks the back of the KVP linear compensator perfectly.
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Helpful Negative Review Middle of the pack by northeast huntere, Verified Owner, August 4, 2023
I like the size and weight. However was not impressed with the mounting system. Could use an anti-rotation feature with a slightly different barrel nut. With that being said 15in free floating rail for the price this is a solid middle of the pack ch...
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Most Recent Reviews FM Gen 2 AR15 handgard w barrel nut by Michael B, Verified Owner, July 14, 2025
Shipping has improved with Optics Planet and as always, products are as described. I think this hand hard is going to be a perfect match to my other Ar I always like the full rail on the top and the Mloks are easy to use. With also for more possibi...
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Most Recent Reviews Should have spent more… by Herbert Santana, Verified Owner, December 6, 2023
Guys, just for the record, not trying to badmouth the hand guard but here is MY experience with it.. first impression was great, the right size for a 22 cal AR build with suppressor inside… nice look to it so was enthusiastic about it until.. no way ...
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0/5 found this helpful
Most Recent Reviews Total Garbage by RB, Verified Owner, January 24, 2024
Save your money.. spend a little more for a better product.
0/7 found this helpful
Read All 9 Reviews
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Product Info for FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut

The Foxtrot Mike Products Ultra Light M-LOK handguard features an ergonomic, slim-line design for maximum weight savings and strength. The proprietary barrel nut is machined from steel and easily installs with standard 30MM box wrench. The free floated rail is machined from durable 6061-T6 aluminum and mounts to the barrel nut with eight high strength stainless steel screws for a secure and worry free fit.image

Specifications for FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut:

Manufacturer: FM Products
Color: Black
Finish: Mil-Spec Hard-coat Anodized Black
Fabric/Material: 6061-T6 Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Handguard Type: Free-Float
Gun Rail: Picatinny
Condition: New
Included Accessories: Barrel Nut
Mount Type: M-LOK
Quantity: 1

Features of FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut

  • M-LOK compatible at 3, 6, and 9 o'clock positions for lights, grips, bi-pods, and other accessories;
  • Single piece free float design that is lightweight and durable;
  • Machined from 6061-T6 aluminum;
  • Mil-Spec hard-coat anodized black;
  • Ultra 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);
  • M-Lok compatible slots on 7 sides, tons of real estate to mount accessories where you want them

Package Contents:

  • FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut

FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut Orderable Models

List of Orderable Models

FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 15 in, FM-HG15 , MPN: FM-HG15 , Code: 3JR-HZ-FM15HG2-FM-HG15
FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 8.5 in, FM-HG8.5 , MPN: FM-HG8.5 , Code: 3JR-HZ-FM15HG2-FM-HG8-5
FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 10.5 in, FM-HG10.5 , MPN: FM-HG10.5 , UPC: 3539002 , Code: 3JR-HZ-FM15HG2-FM-HG10-5

FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut Unavailable & Discontinued Models

List of Unorderable Models

USED, FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 8.5 in, FM-HG8.5 , MPN: FM-HG8.5-EDEMO , Code: 3JR-HZ-FM15HG2-FM-HG8-5-EDEMO-IN-D
USED FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 10.5 in, FM-HG10.5, EDEMO1, Used, Condition Fair , MPN: FM-HG10.5-EDEMO1 , Code: 3JR-HZ-FM15HG2-FM-HG10-5-EDEMO1
USED FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut, Black, 15 in, FM-HG15, EDEMO1, Used, Condition Fair , MPN: FM-HG15-EDEMO1 , Code: 3JR-HZ-FM15HG2-FM-HG15-EDEMO1
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