Century Arms US PALM STORM CAT4 5.56 NATO Semi-Auto AR Rifle, 16″ Barrel, 30+1, Black

The Century Arms US PALM STORM CAT4 is a no-compromise semi-automatic AR-pattern rifle chambered in .223 Rem/5.56 NATO, built for serious range work, home defense, and tactical applications. With a 16-inch barrel, ambidextrous safety, and a 1:7″ twist rate optimized for stabilizing modern 5.56 projectiles, this rifle is ready to perform out of the box. The muzzle is threaded at 1/2″x28, giving you immediate compatibility with a wide range of muzzle devices and suppressors.

Key Specifications

• Chambered in .223 Rem / 5.56 NATO for broad ammunition compatibility.
• The barrel measures 16 inches for a balanced, maneuverable platform.
• Features a 1:7″ rate of twist, optimized for heavier 5.56 projectiles.
• Semi-automatic action delivers reliable, consistent cycling shot after shot.
• Ships with a capacity of 30+1 rounds, including one 30-round magazine.
• Equipped with an ambidextrous safety for left- and right-handed shooters.
• Muzzle is threaded 1/2″x28 for easy installation of your preferred muzzle device.
• Finished in an all-black configuration for a clean, tactical appearance.
• Comes optics-ready with no sights installed, allowing full customization of your aiming solution.

The STORM CAT4 makes a strong case for shooters who want a capable, feature-forward AR without unnecessary extras driving up weight or complexity. The ambidextrous controls and pre-threaded muzzle make it an ideal foundation for a custom build or a ready-to-run rifle that accepts your optic of choice. Whether you’re stacking rounds downrange at the range or keeping it staged for home defense, this Century Arms platform delivers the durability and versatility that experienced AR shooters demand.