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Daniel Defense MK18 Rail Interface System II (RIS II) – Black – 9.55″


Mk18 RIS II Rail,

Black, 9.55 in.

Designed at the request of the United States Special Operations Command (SOCOM) for the SOPMOD II program.

Out of stock

SKU: DanielDefense-01-004-08020-006 Categories: , ,


The Daniel Defense Rail Interface System (RIS II) was designed at the request of the United States Special Operations Command (SOCOM) for the SOPMOD II program. SOCOM had a specific requirement for a free float M203 solution and Daniel Defense responded, designing a revolutionary product to meet the government’s need. The Daniel Defense RIS II allows the individual operator to free float the M203 grenade launcher without additional parts. As important, special tools are not required to mount the M203 grenade launcher. This was accomplished by integrating all of the needed parts to free float the M203 into the rail itself. The Daniel Defense RIS II is to be used in conjunction with the MK12 Low Profile Gas Block.

Aircraft Grade 6061-T6 Aluminum
Free-Floating Barrel Design For Increased Accuracy
Two-Piece Design for USSOCOM Allows For the Attachment of an M203 Grenade Launcher When Lower Rail Section is Removed.
Battle-Tested, 6-Bolt Bolt-Up System Securely Attaches Handguard to the Upper Receiver
Grade 8 Military Specification Fasteners
Uninterrupted Upper Rail Platform & Mil-Spec 1913 Picatinny Rails
Mil-Spec Type III Hard Coat Anodized Finish (Black)

Product Weight: 14.1 oz
Rail Length: 9.55″
Width: 2.23″
Height: 2.25″
Inside Diameter: 1.15″
Barrel Nut: Steel (For Patented Bolt-Up System)
Gas System: Carbine
Free Float: Yes
Continuous Upper Rail: Yes
Integrated Sling Swivel Attachment Point: No

Additional information

Weight 2.0 lbs
Dimensions 13 × 4.5 × 4.5 in

Geissele Automatics


Super Modular




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