Calibre 50

Calibre 50 is a norteño band from Mazatlán, Mexico that was founded in 2010. The group is considered by some to be "norteño-banda" because Calibre 50 uses a tuba to play the bass notes instead of an electrical bass or tololoche. Keeping active with a regular album release cycle and an ardent international touring regime, Calibre 50 is regarded as one of the premier Mexican norteño bands of its generation.