Well, something that G&G should be aware about if it is ok that is design is used by another company. Anyway, Gae Bong Soon goes into gel blasters doing a review of the Tian Gong ARP9 Gel Blaster. The Tian Gong ARP9 Gel Blaster is an automatic, battery-operated gel blaster that features a semi-auto firing mode. It is constructed from high-quality ABS material and has a thick, solid body. The blaster uses 7-8mm gel balls, which are made of water polymer and are easy to break and non-toxic.