Frankly, I pulled the early Viramontes association with mags from a SCOTUS Blog entry with listed it (of course, It's not at hand right now).
However, I'm not seeing it in the proceedings. The initial pleading is on AWs, only. The
pleading for Grant also limited.
So, a direct approach to the magazine issue doesn't appear to be in the pleadings of either. However (pure speculation) it may be reached by SCOTUS needing to define "arms" in these cases. (After another quick scan of Viramontes, it seems a weak vehicle).