User blog comment:Crimson Storm Mich/Future Units Preview v2/@comment-32111784-20170812082250/@comment-31529105-20170812152959

The weapons are those that the summoner themselves use in the summoner arc, which is unlocked after defeating the final boss of Menon of Ishgria. As you progress through the summoner arc, you unlock more powerful and different weapins that can be used. The weapins listed above aren't in BF Global yet.