The Radical Firearms FR16 Rifle (Radical part no. FR16-5.56SOC-15SHR-GRY) is a 5.56 NATO AR-15 finished in Grey and built on MIL-STD upper and lower receivers for broad parts compatibility. Also safe to run .223 Remington, it’s built around a 16-inch barrel with a fast 1:7 twist rate suited to heavier bullet weights. Radical’s own 15-inch MHR free-float rail system keeps your hands cool during extended strings of fire while leaving plenty of room for accessories. A B5 grip and B5 stock provide a comfortable, secure hold whether you’re shooting prone or upright, and the rifle ships with a 30-round magazine ready to load.

Key Specifications

• Chambered in 5.56 NATO for reliable AR-15 performance.
• Also safely fires .223 Remington ammunition through the same chamber.
• Rifling twist rate of 1:7 suits heavier bullet weights.
• 16-inch barrel balances maneuverability with reliable 5.56 velocity.
• Ships with a 30-round magazine.
• Semi-automatic action cycles with each trigger pull for fast follow-up shots.
• Built on MIL-STD upper and lower receivers for broad parts compatibility.
• 15-inch MHR free-float rail system keeps hands cool and leaves room for accessories.
• Equipped with a B5 grip and B5 stock for a comfortable, secure hold.
• Finished in Grey for a look that stands apart from standard black builds.

Frequently Asked Questions

What caliber does this rifle chamber? 5.56 NATO, also safe for .223 Remington.

What handguard does it use? Radical’s own 15-inch MHR free-float rail system.

What furniture does it use? A B5 grip and B5 stock for a comfortable, secure hold.

Buy the Radical Firearms FR16 Rifle

Want a 5.56 AR-15 with a free-float rail and a finish that stands out? Order this Radical Firearms rifle from our AR rifles lineup and we’ll ship it fast and insured to your local FFL from our Lubbock, Texas shop.