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Questions & Answers
Will this fit on a DDM4V7 with 16" barrel? Expert Answer

Yes, the Geissele 16in Super Modular Rail is compatible with Mil-spec AR15 pattern receivers, such as the DDM4V7, and will include a barrel nut with mounting hardware.

by Ethan, Gear Expert, August 22, 2022
How much do these rails weigh? Expert Answer

The Geissele 16in Super Modular Rail weighs 17oz (18.4oz w/ barrel nut) and is made from 7000 Series Aluminum. These rails have a 1.26" inside diameter.

by Ethan, Gear Expert, June 16, 2022
Customer Reviews
Helpful Positive Review
Top notch hand gaurd by Elkcoholic, Verified Owner, December 17, 2023
Was little concerned how the arca Swiss milling would feel in hand. I am very happy now that I have it together. Feels great in hand. The arca Swiss is super easy and fast to attach. The bipod I have literally goes anywhere I want on the hand guard. ...
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3/3 found this helpful
Helpful Positive Review
Best Handguards by P.Santos, Verified Owner, August 25, 2024
These are the best Arca Handguards out right now. They have the holes in the bottom for the arcalock mounts like the RRS and there is no POI shift from different positions. I had to cut mine down to 13.5” for my 14.5” barrel and that is the only ne...
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1/1 found this helpful
Helpful Positive Review
Exactly what a modern AR-15 handguard should be by JR, Verified Owner, August 20, 2024
Grabbed this for a 'modern' approach to a Mk12 - imagine if there was a Mk12 Mod 3 - because of the integrated ARCA and frankly the longer length at 16.5 inches. The ARCA is chamfered probably so there are not any sharp edges and all and you can get ...
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1/1 found this helpful
Most Recent Reviews
One of the best rails I have ever used by Eli, Verified Owner, January 29, 2025
Geissele knew what they were doing with this design, very smooth and consistent. Locks into place securely and simply. Makes SPR/DMR building easy. Would definitely recommend to anyone looking to build a similar rifle design. As expected, rail weighs...
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Most Recent Reviews
Slapped this on an 18” build and it looks beautiful and feels solid. Geissele really does pride themselves in precision and it shows in the fit and finish of this ARCA compatible rail.
Read All 5 Reviews
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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Geissele Mk18 M-Lok Super Modular Rail

The MK18 is the latest in the line of Geissele Super Modular rails and is specifically made to interface with the Arca-Swiss Quick Release System. This new handguard is based on the MK16 M-LOK Super Modular Rail, offering a small diameter and overall height creating a slim profile for competition shooters. The flat base of the MK18 features an "Arca-Style" 35mm wide form with a 45 degree dovetail, that allows quick mounting to an Arca-Swiss Quick Release mounting base, sliding into any position along the rail. The MK18 features Geisseles proprietary 2.25in long barrel nut that interfaces with the receiver and creates a platform that can be trusted to be straight and true the entire length of the free float rail. The 16in long MK18 is 3D precision machined using 6061-T6 Aluminum due to its strong, rigid and lightweight properties.image

Utilizing Magpuls M-LOK technology at the major 3 quadrants (left, right and bottom), as well as the upper 45's gives the MK18 unprecedented modularity and ability to be customized. The MK18 Super Modular rail is finished in a durable and long lasting Type 3 Hardcoat Anodize available in either Black or Geisseles DDC finish.

The Geissele Super Modular Rail MK18 is compatible with AR15 pattern rifles.

WARNING: California`s Proposition 65

Specifications for Geissele Mk18 M-Lok Super Modular Rail:

Manufacturer: Geissele
Finish: Type 3 Hard Coat Anodized
Fabric/Material: 6061-T6 Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Handguard Length: 16 in
Gun Rail: M-LOK
Condition: New
Included Accessories: Standard
Country of Origin: USA
Quantity: 1

Package Contents:

  • Geissele 16in Super Modular Rail MK18, M-Lok, Arca-Swiss

Geissele Mk18 M-Lok Super Modular Rail Orderable Models

List of Orderable Models

  • Geissele Super Modular Rail, MK18, M-Lok, Arca-Swiss, 16in, Black, 05-791B , MPN: 05-791B , UPC: 817953025147 , Code: 1TO-HZ-QR107D-05-791B
  • Geissele Super Modular Rail, MK18, M-Lok, Arca-Swiss, 16in, Desert Dirt Color, 05-791S , MPN: 05-791S , UPC: 817953025154 , Code: 1TO-HZ-QR107D-05-791S

Geissele Mk18 M-Lok Super Modular Rail Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Geissele Super Modular Rail, 16in, MK18, M-Lok, Arca-Swiss, Black, 05-791B , MPN: 05-791B-DEMO , Code: 1TO-HZ-QR107D-05-791B-DEMO
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