I read this book in the mid 1990's. It was sold as part of a children's gift bag (a bag that contained a book, some sweets, some stickers and some toys). The book was probably only around 150 to 200 pages long.
The book was marketed as linked to Action Man but the only real link seemed to be the logo on the front page.
The story involves a group of soldiers who need to attack an enemy in a bunker/base in a jungle setting.
The base is surrounded by a electric fence that needs to be breached to allow the soldiers to attack.
The book would have been aimed at teenage children (10-12 years old), but had some quite brutal deaths that were not age appropriate.
Some soldiers were mauled by guard dog's, some were electrocuted by the fence and others were blown up by grenades.
The book was part of a series of similar stories.
The front cover of the book was mainly white with I think a purple band at the top and bottom of the page. There was an image of a cartoon like soldier on the front cover with a 6-wheeled buggy being driven by another soldier.