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Daniel Defense M4A1 Rail Interface System (RIS) II Flat Dark Earth

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Availability: Out of stock


Quick Overview

Product Weight 17.7 oz
Rail Length 12.25"
Width 2.23"
Inside Diameter 1.15"
Barrel Nut Patented Bolt-up System - Steel
Gas System Length Carbine
Free Float Yes
Continuous Upper Rail Yes
Integrated Sling Swivel Attachment Point No
Manufacturer Daniel Defense DD


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 importantly, 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. NSN # 1005-01-547-2624 The Daniel Defense RIS II free-floating Picatinny rail systems are designed to allow individual operator to quickly, and without special tools, mount M203 Grenade Launcher and precisely mount SOPMOD accessories to host weapon without effecting point of impact. The Daniel Defense RIS II is an innovative upgrade to the M4 platform and is available for commercial purchase directly from Daniel Defense or any authorized distributor. FEATURES Free Floating Barrel Design Uninterrupted Upper Rail Platform Aircraft Grade Aluminum Hardened Steel Barrel Nut Grade 8 Military Specification Fasteners Mil-Spec 1913 Picatinny Rails MATERIALS & CONSTRUCTION Precision CNC machined from Aircraft Grade Aluminum and Military Specification Type II Hard Coat Anodized in SOCOM approved Flat Dark Earth. Material: Aircraft Grade 6061-T6 Aluminum Finish: Military Specification Flat Dark Earth Anodizing Length: 12.25" Width: 2.23" Weight 17.7 Ounces Inside Diameter: 1.15" Made in the USA! INSTALLATION REQUIREMENTS Our Bolt Up System Barrel Nut Wrench is required for installation

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