Century Arms RI5601AX CA-3 18" 21-Round Threaded Barrel Rifle

The Century Arms RI5601AX CA-3 18" 21-Round Threaded Barrel Rifle is a modern sporting rifle engineered for shooters who demand accuracy, modularity, and reliable performance in tactical or recreational applications. Built on a proven platform, this rifle serves law enforcement trainers, competitive shooters, and serious enthusiasts who require a dependable semi-automatic platform with factory-standard ergonomics and modern accessory compatibility. The threaded barrel design allows shooters to add sound suppressors, compensators, or flash hiders without additional gunsmithing, making it a practical choice for shooters planning to customize their setup.

The 18-inch barrel reduces overall length for improved maneuverability in tactical scenarios while maintaining practical velocity for intermediate rifle cartridges, making this profile ideal for confined environments, vehicle operations, or home defense applications. The rifle features a 21-round capacity magazine, providing substantial firepower for extended drills or range sessions without frequent reloads—a critical advantage in training curricula where magazine changes complicate repetitive practice. Weighing 12.5 pounds, the rifle balances control and durability, allowing shooters to manage recoil impulse effectively during rapid-fire sequences while maintaining acceptable fatigue during extended shooting sessions. The threaded muzzle accepts industry-standard suppressors and brakes, enabling shooters to reduce muzzle report or manage recoil characteristics based on mission requirements or local regulations.

This platform benefits shooters transitioning from military or law enforcement service who are familiar with similar ergonomics, as well as civilian operators building personal defense or training arsenals. The rifle's compact 48-inch overall length makes it maneuverable in vehicles, buildings, or during rapid-deployment scenarios where longer rifles create handling complications. Before purchasing or modifying this firearm, verify local and state regulations regarding barrel length, magazine capacity, muzzle devices, and semi-automatic rifle ownership—rules vary significantly by jurisdiction and change frequently. Ensure all accessories and ammunition selections comply with applicable federal and local law.