Is Black Rifle Coffee stock a buy now that the business is on a more sustainable path?With only a garage and a one-pound roaster, three friends founded Black Rifle Coffee (BRCC -2.11%) in 2014. It started as a direct-to-consumer (DTC) coffee company with a strongly patriotic brand identity. And from those humble beginnings, things have really taken off. The company, which generated nearly $400 million in revenue last year, expects to generate at least $430 million this year.While the business has been succe ...