We finally know why C-3PO's arm was red in The Force Awakens

Star Wars The Force Awakens was an almost perfect way to bring the series back with big spectacle, plenty of entertaining moments and more than a few strong hits of nostalgia.

A big part of that appeal was the numerous appearances by familar characters including returning players like Harrison Ford and Carrie Fisher, as well as those metallic folks R2-D2 and C-3P0. This was a new movie though and 3P0 in particular looked different, sporting a new red arm.

Well the mystery behind that red arm has been teased ever since, with the answer said to be coming in a once off comic book that seemed to miss its release date multiple times over. It's finally out and you can get a breakdown of everything that happens in this video.