Home / Accessory-Rails / Daniel Defense RIS II M4A1 ASSEMBLY FDE Sale! Daniel Defense RIS II M4A1 ASSEMBLY FDE$50100 $48289 Out of stock SKU: 01-004-08001 Category: Accessory-Rails Product ID: 31183 Description Description Free Floating Barrel DesignMil-Spec 1913 Picatinny RailsContinuous Upper Rail Related products Sale! Daniel Defense RIS III 10.5″ ASSEMBLY BLACK $50100 $48289 Sale! Daniel Defense MFR 10.0 M-LOK ASSEMBLY BLACK $31500 $30815 Sale! Bergara BASE 20MOA LONG ACTION $9900 $7915