M4 and MP5 Airsoft AEG Mechbox Upgrade 2011 Ebook Edition

THIS VERSION IS DESIGNED FOR EBOOK READERS WITH LESS PROCESSING AND STORAGE RESOURCES. The primary goal of this guide is to help you improve FPS and ROF in a cost effective way. Different mechbox modification techniques are covered. Additionally, we address the issues of air tightness and battery configuration which are outside of the mechbox but are still highly relevant to the overall airsoft AEG performance.