The Daniel Defense DD4 M4A1 RIII is a semi-automatic AR-pattern rifle chambered for .223 Remington and 5.56 NATO. It features a 14.5-inch government-profile barrel with a pinned muzzle device that produces a 16-inch overall barrel length, along with a mid-length gas system and a 1:7 twist rate. The rifle is equipped with a B5 Systems CAR-15 stock, Nickel Boron bolt carrier group, ambidextrous controls, and a continuous top rail for mounting an optic. One 32-round Daniel Defense magazine is included.

Key features

• Chambered for .223 Remington and 5.56 NATO
• 14.5-inch government-profile barrel with pinned muzzle device and 16-inch overall length
• Mid-length gas system supports smooth, balanced cycling
• 1:7 twist rate stabilizes a broad range of projectile weights
• B5 Systems CAR-15 stock provides adjustable length of pull
• Nickel Boron bolt carrier group offers a durable, corrosion-resistant surface finish

The DD4 M4A1 RIII combines a proven AR-pattern layout with a durable barrel, adjustable stock, ambidextrous controls, and optic-ready rail system.