The One Horse OH-BR02 16" Pistol Gas M4 Contour Barrel in 300 BO is built for shooters who want a straightforward, dependable AR-15 barrel without unnecessary extras. This 16-inch M4 contour profile keeps weight manageable while maintaining rigidity for consistent accuracy. Chambered in 300 Blackout, it is designed to pair smoothly with compatible uppers and pistol-gas systems for reliable cycling.

This barrel’s 1:7 twist rate is optimized for a wide range of 300 BO bullet weights, making it a solid choice for range work, training, or general-purpose rifle builds. Whether you are assembling a new upper or refreshing an existing rifle, the OH-BR02 offers a clean, no-nonsense foundation that lets you configure the rest of your setup to your needs. It reflects One Horse’s focus on practical design and dependable performance for everyday shooters.

Key Features:

• Manufacturer: One Horse
• Model: OH-BR02
• Caliber: 300 Blackout (300 BO)
• Barrel Length: 16 inches
• Barrel Type: M4 Contour
• Gas System: Pistol Length
• Twist Rate: 1:7