Daniel Defense DD4 MK18 RIII 5.56 NATO 10.3 Barrel RIS III 9.5 FDE SBA3 Brace 32rd AR Pistol

Daniel Defense DD4 MK18 RIII 5.56 NATO Pistol10.3" Cold Hammer Forged Barrel - RIS III 9.5" M-LOK - Fully Ambidextrous Less weight, more flexibility-the Daniel Defense DD4 MK18 RIII 5.56 NATO pistol features additional enhancements that make this unmatched platform even lighter, more maneuverable, and more controllable. Built around a cold hammer forged 10.3-inch government profile barrel with 1:7 twist and carbine-length direct impingement gas system. The MK18 RIII features a fully ambidextrous lower receiver and replaces the traditional RIS II quad rail with a lighter-weight RIS III 9.5-inch two-piece handguard utilizing M-LOK attachment instead of Picatinny. Modeled after the RIS II two-piece handguard developed for SOCOM, the RIS III delivers reduced weight while maintaining strength and reliability. Finished in Flat Dark Earth for corrosion resistance and visual appeal. Includes SB Tactical SBA3 stabilizing brace, flash suppressor, and dependable Mil-Spec trigger. Weight 5.27 lbs unloaded. Overall length 26 3/4" - 29 7/8". Includes one 32-round magazine. SKU: 02-191-13295-047-DD, MPN: 02-191-13295-047, UPC: 818773025232.MK18 Heritage with Modern EvolutionThe DD4 MK18 RIII honors the legendary MK18 platform that has proven itself in special operations use worldwide while incorporating modern enhancements. The RIS III handguard represents the evolution from the classic quad-rail RIS II, delivering M-LOK attachment capability with reduced weight while maintaining the strength and reliability expected from Daniel Defense. This modern interpretation retains the proven 10.3-inch barrel configuration while improving handling dynamics through weight reduction and enhanced controls.10.3" Cold Hammer Forged BarrelThe 10.3-inch barrel is cold hammer forged from 4150 Chrome Moly Vanadium steel-an intense hydraulic pressure process that forms exceptionally accurate and durable barrels. The government profile provides optimal balance between weight and rigidity. The 10.3-inch length matches the configuration used for CQB operations, providing ideal balance between velocity, maneuverability, and effectiveness at typical engagement ranges. Outstanding maneuverability and durability in a compact package.1:7 Twist RateThe 1:7 twist rate stabilizes a wide range of bullet weights including heavier 77-grain match ammunition and barrier-blind projectiles. This faster twist rate ensures reliable stabilization of modern defensive and duty ammunition while maintaining accuracy with standard 55-grain and 62-grain loads.Carbine-Length Gas SystemThe carbine-length direct impingement gas system ensures reliable cycling across diverse ammunition types and environmental conditions. The carbine gas length proves optimal for 10.3-inch barrels, providing sufficient dwell time for consistent function while managing back pressure for durability.RIS III 9.5" M-LOK HandguardThe Daniel Defense RIS III 9.5-inch free-float handguard represents the modern evolution of the proven RIS II system developed for SOCOM. The two-piece design maintains the strength and reliability of the original RIS II while incorporating M-LOK attachment slots for accessories and reducing overall weight. The free-float design ensures barrel harmonics remain unaffected by handguard pressure or mounted accessories. CNC machined from 6061-T6 aluminum for exceptional strength-to-weight ratio.M-LOK Attachment SystemM-LOK slots provide versatile accessory mounting capability including lights, lasers, vertical grips, hand stops, and sling mounts. The M-LOK system enables low-profile attachment without the bulk of continuous Picatinny rails, reducing weight and snag points while maintaining rigidity for mounted accessories. This modern attachment standard delivers lighter weight compared to quad-rail configurations.Two-Piece Free-Float DesignThe RIS III features a two-piece handguard design modeled after the RIS II developed for SOCOM. This proven configuration provides enhanced strength and allows for grenade launcher mounting capability while maintaining free-float characteristics. The two-piece design has been rigorously tested and proven in demanding operational environments.Fully Ambidextrous Lower ReceiverThe fully ambidextrous lower receiver provides complete bilateral control capability. Beyond the ambidextrous safety selector, the DD4 lower features ambidextrous magazine release and bolt catch/release, enabling shooters to operate all critical controls from either side without repositioning the firing hand. This true ambidextrous design accommodates left-handed shooters and supports tactical shooting techniques requiring support-hand manipulation.Flat Dark Earth FinishThe Flat Dark Earth finish provides distinctive appearance while delivering superior corrosion resistance and wear protection. The FDE Cerakote ceramic coating withstands environmental exposure, moisture, and abrasion better than traditional finishes. The tan color scheme reduces visibility in many operational environments while providing professional tactical aesthetics.SB Tactical SBA3 Pistol Stabilizing BraceThe SB Tactical SBA3 pistol stabilizing brace provides 5 positions of adjustability for different arm lengths and shooting positions. Integral ambidextrous QD swivel attachment points enable sling mounting on either side. The SBA3 design improves handling and stability during firing while maintaining pistol classification, eliminating NFA registration requirements. Adjustable length ranges from 26 3/4" to 29 7/8" overall.Daniel Defense Mil-Spec TriggerThe Daniel Defense Mil-Spec trigger provides reliable, consistent performance with familiar AR-15 characteristics. The trigger delivers proven functionality for defensive and duty applications with dependable reset and appropriate pull weight for tactical use.Flash SuppressorThe flash suppressor reduces muzzle flash signature, improving shooter's ability to maintain sight picture during rapid fire and low-light shooting. The flash suppressor features 1/2x28 threading for suppressor attachment, enabling sound suppressor use for training or tactical applications.32-Round Magazine CapacityThe included 32-round detachable magazine provides substantial capacity for extended engagements, training, or defensive applications. The higher capacity reduces reload frequency during high-volume shooting while remaining compatible with standard STANAG/AR-15 magazine pouches and carriers.Compact Overall LengthAt 26 3/4" to 29 7/8" overall length depending on brace position, the DD4 MK18 RIII delivers exceptional maneuverability in confined spaces. The compact dimensions prove ideal for vehicle use, structure entry, home defense, and situations where full-size rifles prove unwieldy.Lightweight at 5.27 lbsAt just 5.27 lbs unloaded, the DD4 MK18 RIII represents significant weight reduction compared to quad-rail MK18 configurations. The lighter RIS III M-LOK handguard combined with optimized component selection reduces carried weight and improves handling dynamics. This weight reduction proves valuable during extended carry, dynamic movement, and rapid target transitions while maintaining the durability expected from Daniel Defense. Less weight equals more controllability and enhanced maneuverability.Enhanced Maneuverability and ControllabilityThe combination of reduced weight, fully ambidextrous controls, and optimized ergonomics delivers enhanced maneuverability and controllability. The DD4 MK18 RIII responds quickly to shooter input, enabling rapid transitions between targets and precise shot placement during dynamic shooting. The lighter platform reduces fatigue and improves weapon retention during extended use.Non-NFA Pistol ConfigurationAs a pistol rather than Short Barreled Rifle, the DD4 MK18 RIII does not require NFA registration, tax stamp, or Form 4 approval. This classification enables immediate transfer upon purchase while providing compact dimensions and CQB capability.Duty-Grade ConstructionBuilt to duty-grade standards, the DD4 MK18 RIII proves suitable for professional law enforcement and military use while remaining accessible to civilian shooters. The cold hammer forged barrel, precision manufacturing, and quality control ensure reliability under demanding conditions.Trusted by ProfessionalsDaniel Defense firearms are trusted by professional and recreational shooters worldwide. The DD4 MK18 RIII continues this tradition with proven design, modern enhancements, and the quality control that distinguishes Daniel Defense products. This platform delivers the performance and reliability demanded by those who depend on their firearms in critical situations. The Daniel Defense DD4 MK18 RIII delivers compact duty-grade performance with modern M-LOK capability and fully ambidextrous controls-less weight, more flexibility, unmatched maneuverability.SPECIFICATIONSManufacturer: Daniel DefenseModel: DD4 MK18 RIIISKU: 02-191-13295-047-DDManufacturer Part Number: 02-191-13295-047UPC: 818773025232Configuration: Pistol (non-NFA)Platform: AR-15Caliber: 5.56 NATO (5.56x45mm NATO) (.223 Remington compatible)Action: Semi-AutomaticOperating System: Direct ImpingementBarrel Length: 10.3 inchesBarrel Type: Cold Hammer Forged (CHF) Government ProfileBarrel Material: 4150 Chrome Moly Vanadium SteelTwist Rate: 1:7 inchesBarrel Thread Pitch: 1/2x28Gas System Length: CarbineHandguard: RIS III 9.5 inchesRail System: RIS III M-LOK Free-Float, Two-Piece DesignHandguard Material: 6061-T6 Aluminum, CNC MachinedHandguard Finish: Flat Dark Earth (FDE)Handguard Design: Modeled after RIS II developed for SOCOMBrace: SB Tactical SBA3 Stabilizing BraceBrace Positions: 5 positions of adjustabilityBrace Features: Integral ambidextrous QD swivel attachment pointsOverall Length: 26 3/4" - 29 7/8" (brace positions)Weight: 5.27 lbs (unloaded)Lower Receiver: Fully Ambidextrous (ambi safety selector, ambi magazine release, ambi bolt catch/release)Safety: Ambidextrous Safety SelectorMagazine Release: AmbidextrousBolt Catch/Release: AmbidextrousTrigger: Daniel Defense Mil-Spec TriggerMuzzle Device: Flash SuppressorFinish: Flat Dark Earth (FDE)Magazine Type: Detachable (STANAG/AR-15 compatible)Magazine Capacity: 32 roundsMagazines Included: 1Handedness: Right Hand (fully ambidextrous controls accommodate left-handed shooters)Condition: NewProduct Type: Rifle (classified as pistol for NFA purposes)NFA Status: Non-NFA (pistol classification)Build Grade: Duty-GradeDesign Focus: Reduced weight, enhanced maneuverability, improved controllabilityKey Enhancements: Lighter RIS III M-LOK handguard, fully ambidextrous lower receiverApplications: Close-quarters battle, defensive use, law enforcement, home defense, tactical trainingHeritage: MK18 platform evolution with modern RIS III M-LOK handguard and fully ambidextrous controls