ATI ATIG15MS300ML15 Mil-Sport 300 Blackout 30+1 16" 15" M-LOK Handguard

The ATI ATIG15MS300ML15 Mil-Sport 300 Blackout rifle is a modern platform engineered for subsonic and supersonic applications in a compact, maneuverable package. Built around a 16-inch barrel with a 15-inch M-LOK handguard, this 300 Blackout rifle delivers the ballistic flexibility operators and serious shooters demand—particularly for suppressed duty, tactical training, and medium-range precision work where the 300 Blackout cartridge excels.

The 16-inch barrel length preserves velocity advantages inherent to the 300 Blackout platform while maintaining an overall profile suited to confined-space operations and vehicle-based work. The 15-inch M-LOK handguard provides modern accessory integration without excess weight, allowing users to configure optics, lights, and grips according to mission requirements. At 8.65 pounds, the rifle remains controllable for extended operations while maintaining rigidity for precision shooting. The 30+1 round capacity leverages standard AR-pattern magazines, simplifying logistics and resupply for shooters already invested in that ecosystem.

The ATI Mil-Sport in 300 Blackout is purpose-built for operators, law enforcement trainers, and serious enthusiasts who rely on subsonic ammunition for sound-suppressed applications or who need reliable intermediate-range performance in training and tactical scenarios. The 300 Blackout chambering—a necked-down 5.56mm case optimized for subsonic loads—makes this platform particularly valuable for shooters seeking one rifle that functions effectively across both subsonic and supersonic ammunition without modification. For hunters, home defenders, and range shooters seeking a modern, modular carbine with tactical ergonomics and proven reliability, the ATIG15MS300ML15 represents a proven platform from a manufacturer known for building accessible tactical rifles.