Mil-spec is where the Daniel Defense DD4 RIII 5.56 14.5″ starts, not where it stops. Chambered in 5.56 and built with components selected for performance rather than cost, this is an AR-15 that earns its price.
A semi-automatic AR-15 rifle chambered in 5.56, the Daniel Defense DD4 RIII 5.56 14.5″ combines mid-length direct impingement operation with standard AR-15 architecture for straightforward reliability.
Built Beyond Mil-Spec: Mil-spec is the minimum acceptable standard; this 5.56 AR-15 rifle exceeds it throughout. Components are selected for the tightest tolerances and best available materials, not the lowest cost.
Consistent Performance Under Pressure: Reliability when conditions are bad, ammunition is dirty, and the rifle is hot is what separates professional-grade platforms from recreational ones. This rifle delivers that consistency.
Match-Accurate Architecture: Cold hammer forged or precision button-rifled barrels, hand-fitted components, and proper headspace ensure accuracy that outlasts most optics mounted on it.
Professional Pedigree: The same manufacturing standards that supply military and law enforcement contracts go into every 5.56 rifle that comes off this line — civilian availability, professional build quality.
- Caliber: 5.56
- Barrel Length: 14.5″
- Gas System: Mid-Length Direct Impingement
- Handguard: 5″ M-Lok Free-Float
- Muzzle Threading: 1/2×28
- Magazine Capacity: 30-Round
- Finish: Type III Hardcoat Anodized
- Origin: Made in the USA
Drop-in compatible with mil-spec AR-15 lower receivers. Takes standard STANAG magazines chambered in 5.56 and works with the full range of AR-15 accessories and aftermarket upgrades.
The upper and lower receivers are constructed from 7075-T6 with a Type III Hardcoat Anodized finish — a durable combination that resists corrosion and maintains tight tolerances over an extended service life.
Built for professional duty use, serious home defense, and competition. Trusted by law enforcement, military personnel, and competitive shooters who won’t settle for anything less.
Daniel Defense produces premium AR-15 rifles trusted by elite military and law enforcement units globally, backed by a limited lifetime warranty and Made in USA manufacturing
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