Daniel Defense DD4 Mk18 RIII, 5.56mm, 10.3" Barrel, 1- 32rd Magazine, Black, Short Barreled Rifle

The Daniel Defense DD4 MK18 RIII is the definitive factory MK18 short-barreled rifle, pairing the legendary 10.3" Cold Hammer Forged barrel trusted by U.S. Special Operations Command with the latest RIS III handguard. The RIS III retains the battle-proven free-float design and uninterrupted 1913 top rail of the iconic RIS II—fielded by SOCOM since 2006—while shedding weight and adding seven M-LOK attachment points plus integral QD sling sockets on both sides. The result is the most versatile, lightest, and strongest MK18-pattern SBR ever offered directly from Daniel Defense.

Built on fully Mil-Spec 7075-T6 receivers with enhanced flared magwell, the MK18 RIII features an independently ambidextrous GRIP-N-RIP charging handle, chrome-lined M16-profile BCG, pinned low-profile gas block, and carbine-length direct-impingement system tuned for flawless reliability with any 5.56mm ammunition. At only 5.73 lbs and collapsing to 26.75", it delivers rifle-grade terminal performance in an ultra-compact package optimized for CQB, vehicle operations, and close-protection details.

Every rifle ships with the ergonomic Daniel Defense buttstock and pistol grip, a 32-round magazine, and a full-latch hard case. Proudly made in the USA and backed by Daniel Defense’s lifetime satisfaction guarantee.

Own the gold-standard MK18 straight from the source — order your Daniel Defense DD4 MK18 RIII 10.3" SBR today from Battlehawk Armory and get it fast with expert NFA support.

Specifications:

• Mounting System: M-Lok
• Caliber: 5.56mm NATO
• Muzzle Thread: 1/2"x28 TPI
• Gas System: Carbine
• Barrel Length: 10.3"
• Barrel Profile: Government
• Product Weight: 5.73 lbs
• Length: 26.75" - 29-7/8"
• Magazine: 1- 32rd Daniel Defense Magazine
• Case: Daniel Defense Full-Latch Impact Plastic Case