They were very expensive back then, and they still are. When conducting SWAT training, I would often booby trap a house/building or an area where the team would be entering using various types of traps, including smoke grenades, military-grade smoke grenades.
Still, the basic material is strong and one can build a SWAT team using the basics. The book, published by Paladin Press, is in need of a serious re-write, as there was some material added in the manuscript after I approved the galley copy. Many years ago, I used to teach SWAT to police and security agencies, and I even co-authored a book SWAT Battle Tactics with my late friend, American Kenpo Karate Grand Master John McSweeney.
