From the back of the book

Big Bang is an open-ended series of reference books designed for avid players of roleplaying games, especially in the modern and near future genres. Each volume presents factual data and information on a number of weapons, including details of the weapon’s history, along with statistics allowing immediate use in a number game systems. The factual, real world data can be used to easily adapt the presented weapons to a wide range of game systems.

User summary

Mini-Bang 4 contains rules, descriptions and statistics for the following weapons:

AA12 Automatic Shotgun
AAI CAWS
Atchisson Assault Gun
Daewoo USAS-12
H&K CAWS
Pancor Jackhammer
S&W AS-1 Assault Shotgun