Who makes barrels for bushmaster AR-15?

Bushmaster AR-15 barrels are typically manufactured by various suppliers, including companies like FN Herstal, who have historically produced barrels for Bushmaster. However, Bushmaster may also source barrels from other manufacturers or create their own in-house. It's important to note that the specific supplier can vary based on production runs and models. For the most accurate and current information, checking directly with Bushmaster or industry resources is recommended.