Out of stock
Daniel Defense M4A1 RIS II 12.25" 6061 T6 Aluminum Forend Rail Interface System, Flat Dark Earth - 408001
Out of stock

Daniel Defense M4A1 RIS II 12.25" 6061 T6 Aluminum Forend Rail Interface System, Flat Dark Earth - 408001

SKU 793606
Brand Daniel Defense
Model Number 408001
UPC 852548002820
Customers must read Compliance Information before purchasing.
This product is fulfilled by a PSA Partner and shipping times may vary.

Product Details


  • Type: Forend
  • Series/Collection: M4A1 RIS II
  • Material: 6061 T6 Aluminum
  • Finish: Hardcoat Anodized
  • Color: Flat Dark Earth
  • Length: 12-1/4"
  • Width: 2.23"
  • Height: 2-1/4"
  • For Use With: AR-Platform Rifle
  • Weight: 17.7 oz
  • Inside Diameter: 1.15"
  • Gas System: Carbine


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.


  • Free-floating barrel design for increased accuracy
  • 2-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 and Mil-Spec 1913 Picatinny rails
  • Steel barrel nut
  • Carbine gas system


Q & A


All NFA Rules Apply.
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.