{"product_id":"ris-ii-m4a1-assembly-black","title":"Daniel Defense RIS II M4A1 Assembly – Drop-In Rail System for M4\/AR-15 Carbines","description":"\u003cp\u003eThe Daniel Defense RIS II M4A1 Assembly is a drop-in, free-floating rail system engineered to military specifications for carbine-length AR-15 and M4-pattern rifles. This quad-rail handguard provides a continuous MIL-STD-1913 Picatinny interface on all four sides for mounting lights, lasers, grips, and other accessories without compromising barrel harmonics or accuracy.\u003c\/p\u003e\u003cp\u003eConstructed from 6061-T6 aluminum with a hard-anodized black finish, the RIS II installs without permanent modification to the upper receiver. The system includes all necessary mounting hardware and maintains compatibility with standard front sight assemblies and low-profile gas blocks. Heat shields protect the shooter's hands during extended firing sessions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Free-Floating Quad Rail Handguard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e M4\/AR-15 carbine-length gas systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061-T6 aluminum, hard-anodized black finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRail Interface:\u003c\/strong\u003e MIL-STD-1913 Picatinny on all four sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Mounting hardware, installation instructions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Direct replacement for standard M4 carbine handguards\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daniel Defense","offers":[{"title":"Default Title","offer_id":47950706639103,"sku":"DD0100408001006","price":538.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/DD0100408001006.jpg?v=1766721780","url":"https:\/\/doublestackstore.com\/products\/ris-ii-m4a1-assembly-black","provider":"Double Stack Store","version":"1.0","type":"link"}