This US issue manual is a truly hands on and is the only M4/AR15 book you will ever need.
Filled with how to photos and complimented by detailed text, it covers every part right down to the smallest pin.
A few of the topics covered are:
Disassembly, Assembly, Maintenance, Troubleshooting, Tools Required, Inspection and much more.
If you want to understand how the rifle works and how to keep it working this book is an absolute must.
124 pages.