Daniel Defense DD4 MK18 RIII SBR – Black

The Daniel Defense DD4 MK18 RIII SBR is built for shooters who want power, precision, and control in one compact system. It offers improved handling, better balance, and lighter weight compared to previous models. This advanced platform is engineered for demanding environments where speed and accuracy matter. Every feature supports smooth operation and dependable results in close-quarters situations.

Enhanced Performance With a Lighter, Stronger Build

Daniel Defense designed the MK18 RIII to deliver excellent maneuverability without losing strength. The rifle uses a 10.3″ chrome-lined, heavy-phosphate-coated Government-profile barrel. This barrel withstands hard use and offers reliable performance in harsh settings. Its length makes fast target transitions easy while keeping recoil controlled.

The carbine-length gas system ensures smooth cycling. It balances pressure well and reduces unnecessary wear. This makes each shot consistent and comfortable for the shooter. The flash suppressor also helps manage muzzle flash during low-light shooting.

The standout upgrade is the shift from the RIS II rail to the improved RIS III 9.5″ rail system. Daniel Defense built this model with a lighter, M-LOK compatible rail. This reduces overall weight and supports easy accessory mounting. The rail remains strong and stable yet feels noticeably lighter in hand. The design comes from the SOCOM-tested RIS II system but adds more modern features for today’s needs.

The rifle’s construction uses 4150 Chrome Moly Vanadium steel, a material known for strength and heat resistance. The cold hammer-forged barrel ensures long life and dependable accuracy. The 1:7 twist rate allows excellent performance with a wide range of ammunition.

Ambidextrous, Adaptable, and Ready for Any Environment

One key advantage of the MK18 RIII is its fully ambidextrous lower receiver. Shooters can operate the rifle’s controls without shifting their firing grip. This boosts speed, safety, and comfort for both left- and right-handed users. The design supports fast reloads and easier weapon manipulation during dynamic shooting.

The compact size also makes the rifle ideal for tight spaces. Its length ranges from 26.75″ to 29.9″, depending on stock position. With a total weight of only 5.73 lbs, it remains light enough for long sessions without fatigue. The shooter enjoys natural movement and enhanced control during rapid engagements.

Using M-LOK on the RIS III rail also improves versatility. Accessories attach securely while keeping the handguard slim. The system supports modern lights, grips, lasers, and slings with a clean, uncluttered setup. This gives the shooter more freedom to customize the rifle while maintaining balance.

Every component works together to create a smooth, responsive shooting experience. The rifle’s durability makes it suitable for professional duty, training, or personal defense. Its lightweight frame and upgraded features give shooters confidence in high-pressure situations.

Technical Specifications

• Length: 26.75″ – 29.9″

• Weight: 5.73 lbs

• Barrel Material: 4150 Chrome Moly Vanadium

• Barrel Type: Cold Hammer Forged

• Barrel Profile: Government

• Barrel Length: 10.3″

• Twist Rate: 1:7

• Gas System: Carbine

• Muzzle Device: Flash Suppressor

• Rail System: RIS III 9.5″ (M-LOK Compatible)

What’s Included in the Box

• Daniel Defense DD4 MK18 RIII SBR – Black

• Owner’s Manual