The Geissele 15in M-LOK Super Modular Rail MK8 is the perfect complement to any long-range or tactical AR10 or AR 15 build. The AR Handguards & Forends come with M-LOK attachment ports and Picatinny rails, both in the 3, 6, and 9 o’clock positions, so you can equip it with a wide variety of attachments and accessories. It is designed to be super modular, giving you complete customization over how it looks and performs. As a free-floating handguard, the Geissele MK8 Super Modular Handguard prioritizes ventilation and heat dissipation to protect your hands and sensitive components while shooting. It also features the proprietary Geissele 2.25″ barrel nut that maximizes surface contact between the rail and receiver to give you the most stable shooting platform possible, increasing your accuracy and consistency. NOTE: IF THIS IS YOUR FIRST TIME PURCHASING A GEISSELE AUTOMATICS RAIL, YOU WILL NEED TO PURCHASE A BARREL NUT WRENCH IN ORDER TO PROPERLY INSTALL THE RAIL. Specifications for Geissele 15in M-LOK Super Modular Rail MK8: Manufacturer: Geissele Finish: Type-3 Hardcoat Anodize Fabric/Material: 6061-T6 Gun Type: Rifle Handguard Length: 15 in Gun Rail: Picatinny Weight: 12.4 oz Condition: New Included Accessories: Standard Inner Diameter: 1.35 in Outer Diameter: 2.11 in Mount Type: M-LOK Country of Origin: USA Quantity: 1 Features of Geissele 15in M-LOK Super Modular Rail MK8: Available in Black and DDC 15-inches Long for Extended Barrels Type 3 Hardcoat Anodized Finish Free-Float Design Maximum Heat Dissipation Package Contents: Geissele 15in M-LOK Super Modular Rail MK8 NOTE: IF THIS IS YOUR FIRST TIME PURCHASING A GEISSELE AUTOMATICS RAIL, YOU WILL NEED TO PURCHASE A BARREL NUT WRENCH IN ORDER TO PROPERLY INSTALL THE RAIL.
6 reviews for Geissele 15in M-LOK Super Modular Rail MK8
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Broc –
This is a heavy duty rail. This thing looks great as well. Machining and finish were excellent except for a few tool marks where it changes diameter at the barrel nut. Barrel nut system is incredibly easy to install. No indexing and the included tool worked great. Gas block is great too. Double set-screw and option to pin covers all your bases.I mounted this on a Mega Arms Billet Upper/Lower with a Strike Industries Enhanced Pivot Pin. You will need to do some dremel work to allow this rail to work with this combo so be prepared for that. The Anti-rotation tabs needed about 1/16-1/8 of metal ground off to clear the beefier upper receiver. Be careful cranking down the set screws on the anti-rotation tabs. I also needed to grind a channel on the underside of the rotation tab to allow it to clear the larger pivot pin.Some people may not be comfortable grinding metal off a $300 rail which is completely understandable. It's a great looking and functioning combo if that doesn't scare you.
PreacherMan356 –
Geissele has always had a great reputation in the gun world. This rail is excellent. I chose this rail for my first AR-15 build. I could not have asked for a better product. It was super easy to install, however, I would recommend reading through the installation directions carefully to avoid frustration. Nonetheless I was able to install it without any problem.The M-lok system was a big plus for me. It gives the option of attaching anything you can think of or nothing at all. This Geissele rail would make a great fit on whatever rifle you want to put it on. Will definitely be a go to choice for my next build.
Rick A. –
Build my upper with this Giessele MK8 rail, an Odin Works slick side receiver, an 18" Odin rifle length 3-gun barrel,an Odin adjustable gas block,a Seekins brake, Giessele Super Charging Handle, Fail Zero Nickel Boron BCG, Troy 45 degree folding sights, and a Leupold VX-6 1-6×24 scope…The Giessele MK8 rail looks and performs perfect!!! I would recommend any or all of these components.
ed –
What can i say, i absulutly love this rail. I own three of these mk8 hanguards and they're worth every penny! None of my AR's are complete without a Geissele rail! You will need the Geissle barrel nut wrench that is sold seperatly. i suggest for Geissele to include this as a free gift since you are already paying for a good amount of money for a handguard.
D –
Love the MK8 handguard! Definitely recommend if you’re looking for a new rail!
Dakota –
First free float system I've installed and it was seamless, has everything you need, gas block, Allen keys, and wrench piece for the new barrel nut (which it comes with, it didn't say it did before). Very clean look very well machined. Came packed nicely and on time, what I've come to expect from optics planet and geissele is a new favorite.