The Daniel Defense DD4 RIII S is the short-barrel configuration of the RIII series — the most advanced line of semi-automatic carbines ever produced by Daniel Defense. The RIII family represents the direct evolution of the AR-15 platforms Daniel Defense has supplied to special operations forces, professionals, and serious sport shooters for over two decades. Built in the United States to military-grade material and manufacturing standards, the DD4 RIII S pairs a 279mm (11.5") Cold Hammer Forged barrel with the 10.5" RIS III rail — directly derived from the RIS II two-piece handguard developed for SOCOM — in a compact, fully ambidextrous platform.
Technical Specifications :
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Caliber: 5.56mm NATO / .223 Remington
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Action: Semi-automatic, direct impingement
- Mag capacity : 30 rds
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Barrel length: 279mm (11.5") — Government profile, Cold Hammer Forged
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Barrel material: 4150 Chrome Moly Vanadium — chrome-lined, military-spec phosphate coated, HP/MPI tested
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Twist rate: 1:7" (optimized for 62-grain and heavier projectiles)
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Overall length: 710–795mm (27.9"–31.3") — 6-position adjustable stock
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Weight (empty): 2,685g (5.92 lbs)
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Gas system: Direct impingement, carbine length, pinned low-profile block
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Handguard: RIS III 10.5" — 6061-T6 aluminum, Type III Hard Coat Anodized, M-LOK, two-piece, 6-bolt Bolt-Up system
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Lower receiver: Fully Ambidextrous Mil-Spec — bolt catch, safety selector, magazine release — 7075-T6 aluminum, Type III Hard Coat Anodized, enhanced flared magwell
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Upper receiver: Mil-Spec with indexing marks and M4 feed ramps — 7075-T6 aluminum, Type III Hard Coat Anodized
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BCG: M16 profile, MP tested, chrome-lined, properly staked gas key
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Buffer: H Buffer
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Charging handle: GRIP-N-RIP, fully ambidextrous — 7075-T6 / 6061-T6 aluminum
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Muzzle device: Daniel Defense flash suppressor — 17-4 PH stainless steel, salt bath nitride finish — 1/2×28 threading
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Stock: Daniel Defense Buttstock — glass-filled polymer, Soft Touch overmolding, integral QD point
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Grip: Daniel Defense Pistol Grip — glass-filled polymer, Soft Touch overmolding
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Sights: Sold separately
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Finish: Black — Type III Hard Coat Anodized
