The Browning AB3 Composite is a bolt-action rifle chambered in .300 Win Mag with a 26-inch threaded barrel finished in Tungsten Cerakote. It has an OD Green composite stock, a 3+1 round capacity, and ships with a radial muzzle brake. 
 

Key Specifications 

• Brand: Browning 
• Model: AB3 
• Caliber: .300 Win Mag 
• Action: Bolt Action 
• Capacity: 3+1 
• Barrel Length: 26 in 
• Color/Finish: OD Green stock / Tungsten Cerakote 
   

Detailed Features 

• 26-inch threaded barrel with Tungsten Cerakote finish 
• OD Green synthetic composite stock 
• Includes radial muzzle brake 
• 3+1 round capacity 
• Bolt-action platform built around magnum cartridge geometry

The AB3 in .300 Win Mag attracts buyers who want a capable magnum bolt gun without spending up for a premium platform. The radial muzzle brake is consistently mentioned as effective for managing recoil from the .300 Win Mag cartridge, and the Cerakote finish gets positive marks for weather resistance.

Most owners describe the bolt and feeding as reliable across a range of factory ammunition. Trigger quality is the most debated aspect of the AB3; opinions range from serviceable to in need of immediate replacement, and this applies across the caliber lineup.

The OD Green and Tungsten combination is popular for hunting use where a matte, non-reflective finish matters. A few buyers note the 26-inch barrel adds reach at the cost of maneuverability in tight terrain, which is a real consideration for the .300 Win Mag configuration.