Why do that? You're not even boycotting the people you're mad at. That's like boycotting Harley-Davidson because AMF acted like a bunch of jerks when they owned them. Harley isn't owned by AMF anymore, and S&W isn't owned by the wienies that kissed Hillary's ankles (took them a week to work all the way around).
You continue to boycott them because S & W still has an agreement with the federal government. That it isn't being enforced at the moment isn't significant in the overall scheme of things.
When a firearms company makes an agreement similar to S & W's the owner of the company (Tompkins, PLC) should have to sell the pieces at auction as a result of a bankruptcy. Selling the company, and it's obligations, keeps the agreement alive and reduces the parent organization's loss. That's not good enough. The price for entering into such an agreement should be complete financial loss and the end of the company.