What is Chapter 1 of the gun by Paul Langan about?

It seems you might be referring to a book titled "The Gun" by Paul Langan. However, there is no known book with that exact title and author.

If you have the full title and author of the book you are interested in, please provide it, and I can help you find information about Chapter 1.

It's possible you are thinking of a different book, or you may have misremembered the title or author.