FN FN15 Guardian 5.56 NATO

The FN FN15 Guardian is a semi-automatic modern sporting rifle configured around durability and modularity for the range, competitive shooting, and defensive applications. It pairs a 16-inch barrel and a mid-length gas system with a long free-float handguard to support a variety of sighting and accessory setups.

Built with forged 7075 aluminum receivers and an ergonomic FN pistol grip, the Guardian is designed for familiar AR-platform handling and easy optic mounting. The 15-inch M-LOK free-float handguard provides extensive mounting real estate and mates to the upper with an anti-rotation pinch-lock design, while a six-position collapsible stock offers a secure cheek weld and adjustable length of pull.

Key Specifications

• The caliber is 5.56 NATO.
• The action is semi-automatic.
• The barrel length is 16 inches.
• The magazine capacity is 30 rounds.
• The weight is 6.6 pounds.
• The overall length is 32.1 to 35.5 inches.
• The twist rate is 1:7 right-hand.
• The handguard is a 15-inch free-float M-LOK with 24 slots.
• The stock is a 6-position collapsible design.
• The muzzle device is an A2-style flash hider (1/2x28 TPI).

Equipped with a mil-spec trigger, a forged 7075 aluminum receiver set, and standard AR ergonomics, the FN FN15 Guardian is a practical choice for shooters seeking a familiar, adaptable platform. The rifle ships with a 30-round removable magazine and is ready for optics and aftermarket accessories.

Buy the FN FN15 Guardian 5.56 NATO online today to add a versatile, range-ready modern sporting rifle to your collection.

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