Mil-spec is where the Daniel Defense MK18 Short Barrel 5.56 NATO 10.3″ starts, not where it stops. Chambered in 5.56 NATO and built with components selected for performance rather than cost, this is an AR-15 that earns its price.

Built as a semi-automatic AR-15 rifle around 5.56 NATO and a carbine-length direct impingement system, the Daniel Defense MK18 Short Barrel 5.56 NATO 10.3″ delivers a proven AR-15 experience from first round to last.

Built Beyond Mil-Spec: Mil-spec is the minimum acceptable standard; this 5.56 NATO 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 NATO rifle that comes off this line — civilian availability, professional build quality.

Caliber: 5.56 NATO
Barrel Length: 10.3″
Gas System: Carbine-Length Direct Impingement
Handguard: Picatinny Quad Rail
Muzzle Threading: 1/2×28
Magazine Capacity: 30-Round
Finish: Type III Hardcoat Anodized
Origin: Made in the USA

Works with standard AR-15 lower receivers and accepts STANAG 5.56 NATO magazines. Designed for mil-spec carbine buffer systems and compatible with the full ecosystem of AR-15 parts and accessories.

Type III Hardcoat Anodized over 7075-T6 construction gives this AR-15 rifle solid corrosion resistance and a durable surface that holds up across a wide range of storage and operating conditions.

Designed for users who demand mil-spec reliability and match-grade accuracy in the same package — professional duty, competition, and advanced training all fall within this platform’s wheelhouse.

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.