Mil-spec is where the Geissele Automatics Super Duty 5.56 NATO 16″ 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.
The Geissele Automatics Super Duty 5.56 NATO 16″ is a semi-automatic AR-15 rifle chambered in 5.56 NATO, built around direct impingement operation for reliable cycling on the AR-15 platform.
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: 16″
- Barrel Twist: 1:7″
- Gas System: Direct Impingement
- Handguard: Free-Float
- Muzzle Threading: 1/2×28
- Magazine Capacity: 30-Round
- Finish: Desert Dirt Color anodized finish
- Origin: Made in the USA
Accepts all STANAG-pattern 5.56 NATO magazines and pairs with any mil-spec AR-15 lower receiver. Compatible with standard carbine buffer systems and mil-spec lower parts kits.
Receivers are machined from 7075-T6 and finished with the only way to receive a uniform color across all parts and accessories is to have them painted with a different finish such as DuraCoat or Cerakote, providing lasting corrosion and wear resistance under regular use and varied environmental 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.
Geissele Automatics is synonymous with precision — their Super Duty and Freedom Rifle platforms are actively used by U.S. Special Operations units and trusted by professional users worldwide. Made in the USA.
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