2013 Airsoft Technology Self-Paced Training Series Introduction to M4 AEG: Learn the mainstream V2 based M4 architecture: This edition also covers ... modification and the new APS Hybrid gearbox.

This training book has been developed from the ground up for beginners who know little about Airsoft AEG technology. As part of our Airsoft Technology Self-Paced Training Series, this book gives an introduction to the basic M4 AEG architecture. The primary goal of this book is to explain the various AEG technical concepts in very simple language. This edition also covers single-shot-only modification using the APS ASR M4 metal body for demonstration. The new APS Hybrid gearbox is also introduced in greater details. There are review questions and answers at the end of the book to assess your learning result. We believe that this book and its support materials have everything you need for an informative, interesting, challenging and entertaining Airsoft educational experience.