Erik Lawrence & Mike Pannone 
M16/M4 Handbook [EPUB ebook] 

The handy to carry and use handbook of rifle knowledge for all owners/users of the M16/M4 rifle/carbine system. Written by two Special Forces instructors and AR builders this handbook includes decades of knowledge of this weapon system. The most up-to-date explanation of the proper corrections to common malfunctions and how to ensure they don’t happen in the future. Maintenance, inspection, training tips, and common optics used.