The Daniel Defense rail interface system (RIS II) was developed in response to a specific request from the United States special operations command (SOCOM) for the SOPMOD II program. SOCOM required a free float M203 solution and Daniel Defense rose to the challenge by designing an innovative product that would meet this exact need. The RIS II allows operators to free float the M203 grenade launcher without the need for additional parts, offering unparalleled simplicity and functionality. Importantly, the system eliminates the need for special tools when mounting the M203 grenade launcher, making it more user-friendly. By integrating all necessary components directly into the rail, the RIS II offers a streamlined, efficient solution that enhances the operational effectiveness of military professionals. Made from aircraft-grade 6061-T6 aluminum, ensuring both strength and durability in demanding environments Free-floating barrel design for increased accuracy, improving precision by minimizing barrel movement This two-piece design for USSOCOM allows for the attachment of an M203 grenade launcher when the lower rail section is removed The battle-tested, 6-bolt bolt-up system securely attaches the handguard to the upper receiver for enhanced reliability and strength Grade 8 military specification fasteners, ensuring durability and reliability under demanding conditions This design features an uninterrupted upper rail platform and Mil-Spec 1913 picatinny rails for enhanced mounting versatility The product comes with a Mil-Spec type III hard coat anodized finish in flat dark earth (FDE)