Available from Chipotle Publishing:
https://chipotlepublishing.com/product/the-worlds-assault-rifles/

I am often asked about what books someone interested in firearms should get. That's a really hard question to answer because most good books have a pretty narrow focus, but there are a few that are both wide in scope and deep in detail and "The World's Assault Rifles" is one of them. If you are interested in modern military small arms at all, it will be a major pillar of your reference library.