Optimize for Productivity. Standardize for Simplicity. Build your ultimate Bernard™ BTB semi-automatic air-cooled MIG gun. Choose from a variety of necks, handles and trigger styles to optimize welder ergonomics and weld access ‒ plus, standardize with a single line of consumables to simplify maintenance and contain costs. You can count on Bernard™ BTB semi-automatic air-cooled MIG guns to deliver industrial-grade performance and reliability in the most demanding and abusive environments.