Board Thread:Questions and Answers/@comment-110.54.231.236-20171126014612/@comment-3580198-20171126153244

Minene Uryuu gave it to them.

When 9th allied herself with 2nd and 1st, she gave them most of her weapons and other valuable items for protection. She is afterall a terrorist sho there's no doubt that she had those guns (and its pretty stupid for a school girl to be hiding those herself).