Grit, the Katz Broadcasting channel featuring classic Westerns that uses the tagline “Television with Backbone” and that describes itself as “the all-new network television home for your favorite bold, brave and legendary action heroes!” is not available as a Roku Channel. However, Sling TV is available on Roku, and Grit is available on Sling, so you can watch it via your Roku device with a Sling subscription.