FN America FN M16 Military Collector 5.56 20" - AR-15 Rifle

Mil-spec is where the FN America FN M16 Military Collector 5.56 20" 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.

The FN America FN M16 Military Collector 5.56 20" is a semi-automatic AR-15 rifle chambered in 5.56, 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 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: 20"
• Barrel Twist: 1:7"
• Gas System: Direct Impingement
• Handguard: Free-Float
• Muzzle Threading: 1/2x28
• Magazine Capacity: 30 Round
• Finish: Anodized
• Origin: Made in the USA

Fully compatible with standard AR-15 lower receivers and STANAG-pattern 5.56 magazines. Works with mil-spec carbine buffer systems, standard lower parts kits, and the broad ecosystem of AR-15 aftermarket accessories.

Receivers are machined from 7075 aluminum and finished with Anodized, providing lasting corrosion and wear resistance under regular use and varied environmental conditions.

A legitimate duty-grade choice for law enforcement, military, and serious civilian users. Equally capable in competitive environments and demanding professional roles.

FN America has supplied the M4A1 carbine to the U.S. Military since 2013. That same manufacturing standard carries directly into their commercial AR-15 lineup. Made in the USA.