FN FN15 16in Carbine upper receiver assembly is built for dependable AR-15 pattern performance and is supplied as a complete upper receiver package. It features an FN cold hammer-forged CrMoV barrel that is hard chrome lined to Mil Standard 171, M4 feed ramps, and an M16-style bolt carrier assembly with a properly staked gas key and Carpenter 158 MPI bolt for robust cycling and durability.

Key features

• 16 in carbine-length upper receiver assembly built on the AR-15 platform
• Cold hammer-forged proprietary CrMoV barrel with hard chrome lining to Mil Standard 171
• M4 feed ramps for consistent feeding and reliable operation
• Includes M16-style bolt carrier assembly with properly staked gas key and Carpenter 158 MPI bolt
• Charging handle included for a complete ready-to-build upper package
• High pressure tested barrel for confidence in durability under service conditions

Upgrade your build with an FN15 carbine upper assembly engineered for performance and reliability.