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Q&A for Daniel Defense MK18 Rail Interface System II, RIS II — 15 Questions & 11 Answers

Name Daniel Defense MK18 Rail Interface System II, RIS II (4.5)
As Low As $459.99 Save Up to 15%
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Q
Brian, guest, from FL, United States, asked on January 06, 2025

Will this fit a Colt M4 with 16" barrel?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 06, 2025

The Daniel Defense MK18 Rail Interface System is compatible with your Colt AR15 but will require you to remove your delta ring, handguard cap, and front sight post. You must use a low-profile gas block as well in order to use this handguard.

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Q
vince, member, from CA, United States, asked on January 18, 2023

Will this rail work with a Grey ghost precision AR MKII Billet AR-15 Receiver ?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on June 23, 2023

The Daniel Defense MK18 Rail Interface System II, RIS II should work fine with that upper receiver.

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Q
Steve, member, from GA, United States, asked on September 21, 2022

Is this a magpul FDE or Daniel's mil spec fde color?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on September 29, 2022

The Daniel Defense MK18 Rail Interface System II in FDE is made by Daniel Defense and features Daniel Defense's FDE Cerakote color.

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Q
Justin White, member, from NJ, United States, asked on January 03, 2022

Will this fit on a POF 415 Edge with a 12.5” barrel and Gas Piston? Thank you in advance.

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on May 04, 2023

The Daniel Defense MK18 Rail Interface System II will not work with the POF 415 Edge.

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Q
Tony, member, from CA, United States, asked on December 09, 2021

Will this work with pistol length gas tubes? I see but it specifies carbine length, or is that just the max length gas tube that can be applied?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on June 23, 2023

The Daniel Defense MK18 Rail Interface System II, RIS II could be used with a pistol length gas system.

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Q
Zion, guest, from NM, United States, asked on March 14, 2021

Does the rail come with everything needed to attach to upper receiver

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 06, 2021

Yes, barrel nut and mounting hardware are included.

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Q
steveo, member, from CO, United States, asked on February 06, 2021

Is this only compatible with tDD or other manufacturers such as palmetto ?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 06, 2021

This can be used on any mil-spec AR15 upper receiver.

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Q
ArmchairOperator, member, from AL, United States, asked on October 19, 2020

Does this come with a barrel nut wrench and does it come with rail covers?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 06, 2021

Barrel nut wrench and 3 rail covers are included.

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Q
omar, member, from IL, United States, asked on September 21, 2020

Does this rail can be installed on LWRC pistol? LWRC has their own proprietary Monoforge upper receivers with an integrated rail-base.

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on June 23, 2023

The Daniel Defense MK18 Rail Interface System II, RIS II will not work with the LWRC upper.

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Q
Gav, member, from MD, United States, asked on May 02, 2020

Can these be used with other low profile gas blocks?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 06, 2021

Daniel Defense recommends only using this rail with the MK12 Low Profile Gas Block.

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