I would said it's missing some gun, I'm looking for more info on specific gun like CZ-S1M1, but it was not there. the info on each gun is far too litle, each illustration is rough and unclear. the picture of the gun is also very rough.

However, it gives an overall picture of the component of each gun. This is an advatage of the book though. I would reccommend this book for a more expert. It's not suit for a beginner, unless the buyer just want to see an overall component of a gun.

I expected a larger number of firearms to be covered, and some more common ones. It's okay, but a better run-down of what is covered might be helpful for potential buyers.

The good part is this book has a lot of firearms in it. The bad part is each gun is limited to two pages. One page is a picture breakdown and one page is instructions. So the actual assembly disassembly instructions are very limited.

Now in a newly revised and expanded addition, "The Official NRA Guide To Firearms Assembly: Rifles And Shotguns" examines the history and mechanical details of hundreds of historic and popular rifles and shotguns. Collaboratively compiled and deftly edited by firearm experts Joseph B. Roberts & Harris J. Andrews, "Joseph B. Roberts & Harris J. Andrews" features detailed instructions and accurate 'exploded-view' diagrams proving the precise information needed by the reader to successfully dismantle and then re-assemble their rifle or shotgun. The thoroughly 'user friendly', profusely illustrated, step-by-step instructions show precisely how the various parts of the firearm interact and will prove to be an invaluable instructional guide and reference for collectors, dealers, hunters, and shooting enthusiasts. Also very highly recommended from Stoeger Publishing is Joseph B. Roberts and Harris J. Andrews companion volume, "The Official NRA Firearms Assembly: Pistols And Revolvers" (9780883173350, $24.95).

Firearms Assembly : The NRA Guide to Rifles and Shotguns (Revised and Expanded) (Item #01600) (Revised and Expanded)
This is a good basic guide to assembly and disassembly of Rifles and Shotguns. With illustrations and basic instructions on a wide variety of rifles and shotguns.
It has a Firearm Equivalent Appendix in case your specific firearm is not covered. Which is helpful.
The step-by-step instruction is adequate to disassemble most firearms for cleaning and part replacement. Also informs you when to have a gunsmith take over.
A good quick reference. Detailed exploded view of 184 firearms.