User summary: This book is a supplement to the Ops and Tactics RPG system. This book is used to add new, interesting rules on top of the core rule book, in order to give weapons more flavor and more options to players. Volume 4 presents data on "restricted" weapons, primarily short-barreled rifles and short-barreled shotguns. Designed for Ops and Tactics 4th edition; revised for 5th Edition. Page orientation varies between portrait and landscape.