User blog comment:Jaadowgg/Chapter 347 Discussion/@comment-12279366-20140717045604/@comment-5780397-20140719152605

Golem conjures the weapons in their hands (or an armed arm o himself), while the receivers create bullets made out of their own Nen, thus counting as Emitted bullets. If you look closely, you can see Golem materialized an arm with a seat: that is the place for the Emitter who creates the bullets, with Golem firing them.