Daniel Defense DDM4A1 RII 5.56mm Semi-Auto Rifle with 14.5 Inch Pinned and Welded Barrel

The Daniel Defense DDM4A1 RII is a hard-use, duty-ready 5.56mm NATO AR-15 style carbine built around a proven 14.5" M4-profile barrel and a rugged, free-float quad-rail handguard designed for serious accessory mounting. With a carbine-length gas system and a Picatinny top rail, the DDM4A1 RII delivers the handling and reliability shooters expect from Daniel Defense—ideal for enthusiasts looking for a premium 5.56 carbine with rock-solid build quality, excellent fit and finish, and all the mounting real estate needed for lights, lasers, grips, and optics.

Firearm Features

• Daniel Defense DDM4A1 RII platform with free-float quad-rail handguard for maximum accessory mounting
• 5.56mm NATO chambering (also compatible with most .223 Remington loads per manufacturer guidance)
• 14.5" M4-profile barrel for balanced handling and classic carbine feel. Includes pinned and welded muzzle device.
• Carbine-length gas system for proven cycling and performance
• 1/2 x 28 muzzle threads (TPI) for common 5.56 muzzle device compatibility
• Picatinny mounting system for optics and accessories