The ATI Mil-Sport is a semi-automatic pistol chambered in .300 AAC Blackout (7.62x35mm) with an 8.5-inch barrel, 30+1 capacity, and a matte black anodized finish. The threaded barrel uses a 5/8x24 thread pattern and a two-position thumb safety controls the action. 
 

Key Specifications 

• Model: Mil-Sport 
• Caliber: .300 AAC BLACKOUT (7.62x35mm) 
• Action: Semi-Automatic 
• Capacity: 30 + 1 rounds 
• Barrel Length: 8.5 inches 
• Weight: 6.95 lbs. 
• Finish: Matte Black (Black Anodized) 
• Grip Type: A2 Pistol Grip 
• Thread Pattern: 5/8x24 (Threaded Barrel) 
• Safety Features: Two Position Thumb Safety 
   

Detailed Features 

The .300 AAC Blackout cartridge handles both subsonic and supersonic loads, which gives this platform genuine versatility -- subsonic with a suppressor is quiet, supersonic delivers standard terminal performance. The 8.5-inch barrel is a practical length for an AR pistol, balancing ballistic performance with maneuverability. At 6.95 lbs the Mil-Sport is on the lighter end for this configuration. The black anodized finish holds up to regular use and resists corrosion. 
 

Target Audience 

Good fit for home defense use, tactical shooters who want an AR pistol, and hunters who run suppressed subsonic loads. The high-capacity magazine and .300 BLK caliber make it versatile enough for various roles. 
 

Usage Scenarios 

• Home Defense: 30+1 capacity and quick handling. 
• Sport Shooting: Works at the range in both caliber configurations. 
• Hunting: Suppressed subsonic loads are effective for stealthy varmint or small game work.

Owners appreciate the .300 BLK cartridge's versatility -- the ability to run both subsonic and supersonic loads out of the same platform is the most cited advantage. The lightweight build and compact size get positive marks for handling and home defense use. Build quality is generally described as solid.

Reliability issues come up from some owners, particularly feeding and cycling problems with certain ammunition types. Budget ammunition seems to be the most common culprit. Trigger quality is described as functional but unrefined -- fine for its price range but not a standout. Customer service experiences with ATI are mixed, with some owners reporting slow response times when seeking support or replacement parts.

The overall sentiment is cautiously positive for buyers who understand this is a value-priced AR pistol. Ammunition selection matters more on this platform than on some others.