Geissele Freedom Maritime Reconnaissance 6mm ARC 16" - AR-15 Rifle

Long-range performance without a new platform — the Geissele Freedom Maritime Reconnaissance 6mm ARC 16" brings 6mm ARC precision to a standard AR-15 lower receiver, bridging the gap between carbine convenience and genuine reach.

The Geissele Freedom Maritime Reconnaissance 6mm ARC 16" brings 6mm ARC capability to a semi-automatic AR-15 rifle, using a rifle-length direct impingement operating system designed for dependable function in any condition.

Extended Effective Range: The 6mm ARC cartridge maintains significantly better ballistic performance past 300 yards than 5.56 NATO — this is the platform for shooters who need genuine reach from an AR-15.

AR-15 Lower Compatibility: Standard AR-15 lower receivers work without modification. Caliber-specific BCG and magazines are the only requirements, preserving your existing lower investment.

Hunting Viability: Improved terminal energy makes 6mm ARC suitable for deer and medium game at distances where 5.56 runs out of steam — a meaningful expansion of what this AR-15 platform can do.

Precision Potential: The 16" barrel maximizes 6mm ARC velocity and accuracy at the ranges where its performance advantage over 5.56 is most pronounced.

• Caliber: 6mm ARC
• Barrel Length: 16"
• Barrel Twist: 1:7"
• Gas System: Rifle-Length Direct Impingement
• Handguard: 16" M-Lok Free-Float
• Muzzle Threading: 5/8x24
• Magazine Capacity: 30-Round
• Finish: Anodized
• Origin: Made in the USA

Compatible with standard AR-15 lower receivers. Requires a caliber-specific BCG and magazines for 6mm ARC. Works with standard carbine buffer systems and mil-spec lower parts kits.

Machined from 7075 aluminum and coated with Anodized, the receiver set offers durable protection against wear and environmental exposure while maintaining precise fit between components.

Purpose-made for long-range precision work, medium game hunting, and competition shooting. A platform upgrade for shooters who've outgrown what 5.56 can do at distance.

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.