Daniel Defense DD4 RIII S Upper Receiver Group, 11.5″ 5.56

Daniel Defense DD4 RIII S Upper Receiver Group, 11.5″ 5.56 The DD4 RIII is the next generation of Daniel Defense upper receiver groups, coming out of the box with a RIS III handguard. The DD4 RIII S AR15 style Upper Receiver Group is built around a 11.5 inch Cold Hammer Forged Government Profile barrel with a Daniel Defense Flash Suppressor, a GRIP-N-RIP Charging Handle, and our carbine length gas system.  It features a 10.5 inch lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM— which features M-LOK attachment for lighter weight. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group. Specifications Caliber: 5.56mm Upper Receiver: Forged Milspec BCG: Daniel Defense Full-Auto M16 Bolt Carrier Group Bolt: Standard Bolt Rail: 10.5″ RIS III Barrel: 11.5″ Cold Hammer-Forged Barrel, 1:7 Twist Gas System: Carbine Length Gas Block: Daniel Defense Low-Profile Charging Handle: Daniel Defense Muzzle Device: Daniel Defense Flash Hider