User blog comment:HalointheSkye/Volume 3 Chapter 10 Teaser - Ack!/@comment-24994749-20160128192455/@comment-27121579-20160129092343

I'd just assumed that she left her weapon at Beacon, because she wasn't carrying it with her when she was talking to Velvet in Episode 8. If it happens to be at the Colosseum after all, I'lll be a little bitter about the plot-hole, but I guess it doesn't really matter in the grand scheme of things.