Geissele MK8 Super Modular AR-15 Handguard - M-LOK - Black - 13.5"

Manufactured by Geissele Automatics
SKU: 05-285B
MPN: 05-285B
Manufactured by Geissele Automatics
5 Reviews

In Stock

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The Geissele Automatics Mk8 Super Modular Rail is an ultra-light purpose-built free float handguard for the AR-15 platform. This modular rail features M-LOK slots on five surfaces for your favorite accessories that double as excellent heat venting to help your rifle run cool. The included proprietary barrel nut increases surface contact, increasing accuracy and repeatability of zero should the handguard be removed during maintenance.

  • Does not include barrel nut wrench
  • 13.5" handguard weighs just 13.3 oz.
  • Durable black hardcoat anodized finish
  • Full-length M1913 picatinny top rail
  • M-LOK slots on five sides
  • Includes Barrel Nut
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Accessory AttachmentM-LOK
BrandGeissele Automatics
FinishHardcoat Anodized
Gas System LengthExtended Rifle
Handguard Length13.50 in
Inner Diameter1.35 in
Manufacturer.Geissele Automatics
MaterialAluminum - 6061-T6
Weight13.3 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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Would buy again. Well, actually I did.


I own three of these now. The craftsmanship is flawless, fit is perfect and they are rock solid. The price is high but so is the quality. It is not the lightest or skinniest rail on the market but it is an absolute workhorse.

Giessele Mk-8 M-Lok 13" Rail.....Awesome!


Great rail system! Easy install, perfect fit, and locks up tight. Fit and finish is outstanding as well. Perfect length on my DDM4 Carbine. Very comfortable feel in your hand. You'll need to purchase M-Lok rail sections seperately. I went with a 5 slot aluminum rail on the bottom (for GG&G Bipod & Tango Down Stubby QD), and two 3 slot aluminum rail sections for 3'oclock & 9 o'clock positions. There's no way anyone could not like this rail. Giessele did another great job, and you can't beat the price! As usual, super fast shipping by PA. Thanks to everyone at PA!

Gas Block Included!


I forgot to mention, it even came with the Giessele Lo-pro gas block! Which also was a perfect fit and functions flawlessly. The supplied instructions are simple to follow and even includes the proper equipment needed to install the gas block.

Top quality handguard/rail


Great product! Beautifully built. Fit & finish are perfect. Easy install (with proper tools). Locks up nice and tight on the barrel nut & rifle. I installed this on my DDM4 Carbine and it looks great. The intructions are easily understandable and lets you know exactly what other items you'll need if you want to pin the (supplied) gas block to the barrel. A barrel nut wrench is also included. I would highly recomend this product to anyone who's looking for a high quality, great looking handguard/rail.

I love this handguard.


Great handguard. This is my second one. Only downside is that I did receive a gas block with my other handguard. Unsure why this one did not come with one. When i noticed the gas block was missing I did check on website and it doesn't state that the gas block is included. No big deal still a great deal from Primary Arms.