There's actually a lot of former Armor Girls members still doing stuff, most of them solo. Amaki Jun is a top gravure idol. Hoshino Manami is now known as just Hoshino and is also a gravure idol. Yamashita Yua is doing solo activities, satsueikai I think? I follow her on Twitter but don't really know what's going on. Kitamura Maki is still doing work as a solo talent, she had a futsal event or something recently. Itou Miu, while not solo, is now an idol under the name Amau Kisumi and is part of Ready to Kiss.