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Daniel Defense MK18 Rail Interface System II, RIS II Up to $37.00 Off w/ Free Shipping — 2 models

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Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Black 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
1 of 10 images
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Black 01-004-08020-006
2 of 10 images
Daniel Defense MK18 Rail Interface System II, Black 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
3 of 10 images
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
4 of 10 images
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
5 of 10 images
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
6 of 10 images
Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
7 of 10 images
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
8 of 10 images
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
9 of 10 images
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006
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Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006

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Questions & Answers
Will this fit a Colt M4 with 16" barrel? Expert Answer

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.

by Ethan, Gear Expert, January 6, 2025
Will this rail work with a Grey ghost precision AR MKII Billet AR-15 Receiver ? Expert Answer

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

by Hunter, Gear Expert, June 23, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
One of the best handguards I’ve ever ordered by Anthony, January 1, 2022
This handguard is a workhorse but also a work of art. This handguard fits amazing and is super easy to install. Fit and finish is spot on. It’s well made and worth the money for any regular SBR build and or clone build
4/4 found this helpful
Helpful Positive Review
Never disappoints by WalmartMilk, Verified Owner, February 3, 2024
Ris III can eat it, quad rail > mlok. Truly the best quad rail money can buy for a sbr build. If you’re thinking about it, do it. Just do it. No think, just click.
1/1 found this helpful
Helpful Positive Review
Indestructible by Tony, Verified Owner, January 8, 2025
Rock solid quad rail handguard that look insanely cool.
1/1 found this helpful
Helpful Positive Review
Solid rail, perfect for an SBR. by Jake v, Verified Owner, March 8, 2025
Solid fit, light weight. You’ll get years of service out of their products.
1/1 found this helpful
Helpful Positive Review
What not to say about this classic... by Andy, Verified Owner, May 11, 2020
If you're seeing this then you already know about this rail. It serves a single purpose that that is for the fighting rifle. Not a range toy or social media star etc. The reason you don't see a lot of reviews is because the people running these ra...
Read More...
15/17 found this helpful
Most Recent Reviews
DD MK18 Rail by ARguy, January 15, 2026
One of the best rails out there. Easy to install. Rock solid and ready for anything
Read All 6 Reviews
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Product Info for Daniel Defense MK18 Rail Interface System II, RIS II

The Daniel Defense MK18 Rail Interface System was designed specifically to allow individual operators to free float M203 grenade launchers without the need for additional parts or special tools. These AR Handguards & Forends by Daniel Defense are built with attention to detail and high quality materials for performance and durability. The Daniel Defense MK18 R.I.S. II free floats a standard M203 grenade launcher and does so with a system that does not require drilling, port maintenance, or permanent modification to the host weapon. The free float feature was engineered in as part of the rail itself. This eliminates the need for additional rail sections and associated costs. The gas port and stress relieved metal surfaces of the rail prevent heat related damage to the weapon and its components. This rail is air tight and has an extreme tolerance and strength to prevent damage to the weapon and its reputation. The rail features an ambidextrous sling swivel studs on the rail allow for monopod operation. Integrate the rail into your existing platform with the Daniel Defense MK18 Rail Interface System II.image

Specifications for Daniel Defense MK18 Rail Interface System II, RIS II:

Manufacturer: Daniel Defense
Finish: Hard Coat Anodized
Fabric/Material: Aircraft Grade 6061-T6 Aluminum
Gun Make: AR Platform
Gun Model: Daniel Defense MK18, AR-15
Gun Type: Rifle
Handguard Length: 9.55 in
Gun Rail: Picatinny
Gas System Length: Carbine Length
Weight: 14.1 oz
Condition: New
Additional Features: for The M203 Grenade Launcher
Included Accessories: Standard
Height: 2.25 in
Width: 2.23 in
Quantity: 1
Hand: Ambidextrous
Length: 9.55 in

Package Contents:

  • Daniel Defense MK18 Rail Interface System II, RIS II, DDD-T8-KIOMB

Daniel Defense MK18 Rail Interface System II, RIS II Orderable Models

List of Orderable Models

  • Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006 , MPN: 01-004-08020-006 , UPC: 815604014052 , Code: DDD-HZ-KIOMB-01-004-08020-006
  • Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020 , MPN: 01-004-08020-011 , UPC: 852548002813 , Code: DDD-HZ-KIOMB-DD-8020

Daniel Defense MK18 Rail Interface System II, RIS II Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020 , MPN: 01-004-08020-011-EDEMO , Code: DDD-HZ-KIOMB-DD-8020-EDEMO-SC-D
  • DEMO, Daniel Defense MK18 Rail Interface System II, Black, 01-004-08020-006 , MPN: 01-004-08020-006-DEMO , Code: DDD-HZ-KIOMB-01-004-08020-006-DEMO
  • USED, Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020 , MPN: 01-004-08020-011-EDEMO , Code: DDD-HZ-KIOMB-DD-8020-EDEMO-RE-C
  • USED, Daniel Defense MK18 Rail Interface System II, Handguard 9.55in 2-Piece, Flat Dark Earth, DD-8020 , MPN: 01-004-08020-011-EDEMO , Code: DDD-HZ-KIOMB-DD-8020-EDEMO-IN-C
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