“multibarrel”, presumably meaning multi-cannon mode, is only used in this ability (in the index and the description) and does not appear anywhere else. It'd be better to use Multi-Cannon for consistency. Generally speaking, the consistency isn't great in the rulebook. Markers of damage, for example, are called “broken markers” in the glossary and many places, but they're also called “damage markers” quite often. — Juanma Barranquero 2017/07/14 16:12