ATI ATIG15MS300ML7B MilSport 8.5" 31-Round Threaded Barrel Pistol

The ATI ATIG15MS300ML7B MilSport 8.5" 31-Round Threaded Barrel Pistol represents a purpose-built platform for shooters and professionals who demand modularity and practical firepower in a compact form factor. Chambered in .300 Blackout, this AR-style pistol bridges the gap between traditional rifle ergonomics and the legal and tactical advantages of a short-barrel configuration. The 31-round capacity delivers substantial ammunition reserves for training, duty, or home defense scenarios where sustained engagement capability matters.

Built on proven AR-15 platform architecture, the MilSport features an 8.5-inch threaded barrel that accepts industry-standard muzzle devices—a critical design element for shooters running suppressors or compensators in .300 Blackout. The threaded design allows quick swaps between muzzle brakes for recoil management or suppressors for noise reduction, a capability law enforcement and military operators have relied on for years. At 7.15 pounds, the pistol maintains a balanced, controllable profile that doesn't sacrifice durability or functionality; the all-steel construction and modular upper receiver system ensure long-term reliability and parts compatibility with the extensive AR-15 aftermarket ecosystem.

This platform excels for operators who value customization—rail systems, optics mounts, and tactical lighting integrate seamlessly on the picatinny handguard and upper receiver. The 31-round magazine capacity and short profile make this pistol effective for close-quarters work, precision shooting in confined spaces, or as a secondary rifle system. ARs configured in .300 Blackout show measurable advantages in subsonic performance and barrier penetration, making the MilSport an informed choice for shooters prioritizing terminal performance and suppressed operation in a legally compliant package.