Santan Stt-15 5.56 16" 30-Round Threaded Barrel Rifle

The San Tan Tactical STT-15 5.56 16" 30-Round Threaded Barrel Rifle is a purpose-built modern sporting rifle engineered for shooters who demand reliability, modularity, and precision. Designed for tactical training, home defense, and competitive shooting, this semi-automatic platform combines the proven 5.56 NATO/.223 Remington caliber with a compact 16-inch barrel profile that balances maneuverability and velocity.

The threaded barrel allows direct attachment of sound suppressors, muzzle brakes, or flash hiders without adapters, giving operators field-level customization without gunsmith intervention. Built on the AR-15 platform, the San Tan Tactical STT-15 leverages decades of military and law enforcement adoption to deliver time-tested ergonomics and aftermarket support. The 16-inch threaded barrel provides the velocity sweet spot for 5.56 NATO ammunition while maintaining handling characteristics superior to longer configurations in vehicles, structures, and dynamic environments.

At 10.63 lbs, the rifle achieves a practical weight distribution that reduces shooter fatigue during extended training sessions and tactical scenarios. The 30-round magazine capacity meets standard law enforcement and military doctrine, enabling sustained engagement without frequent reloading. Law enforcement professionals, military personnel, and serious civilian shooters will recognize the San Tan Tactical STT-15 as a direct-impingement rifle optimized for training and duty use.