The American Tactical Mil-Sport is a semi-automatic AR-pattern pistol chambered in .300 AAC Blackout, built around an 8.5-inch barrel and a 7-inch M-LOK handguard. It ships with a rear arm brace and flip-up iron sights, giving it a compact footprint for close-range shooting or as a truck gun. The AR-pattern lower keeps controls familiar to anyone who has run a standard AR platform. 
 

Key Specifications 

• Brand: American Tactical 
• Model: Mil-Sport 
• Caliber: .300 AAC Blackout 
• Action: Semi Auto 
• Barrel Length: 8.5 in 
• Capacity: 30+1 
   

Detailed Features 

• 7-inch M-LOK rail along the handguard for mounting a light, foregrip, or other accessories 
• Flip-up rear iron sight gives a folding backup aiming option 
• Rear arm brace configuration supports a steadier one-handed or braced shooting stance 
• Manual selector safety on the AR-pattern lower 
• Ships with a 30-round magazine for extended range sessions 
• Short 8.5-inch barrel trims overall length for storage and close-quarters handling

Shooters who pick up the Mil-Sport in .300 Blackout like having a compact AR pistol that stays maneuverable in tight spaces, whether that is a truck, a blind, or close-quarters drills. The 8.5-inch barrel keeps the platform short without giving up much practical performance from the .300 Blackout cartridge at typical pistol distances.

Build quality gets mixed marks at this price point. Most owners report the pistol runs reliably once it is broken in and fed ammunition it likes, but a few mention needing to check screws and the rail for tightness after the first range trips.

On value, buyers see the Mil-Sport as an accessible way into a .300 Blackout AR pistol without paying for a name-brand upper. The M-LOK rail and flip-up sights are seen as a fair starting point, and most plan to add an optic or a brace upgrade down the line.