Daniel Defense M4A1 RIS II 12.25" 6061 T6 Aluminum Forend Rail Interface System, Black - 408001006
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Daniel Defense M4A1 RIS II 12.25" 6061 T6 Aluminum Forend Rail Interface System, Black - 408001006, 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.
Features:
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