This is a book or magazine about tanks/AFVs and/or military modeling.
Here's a large-format, mostly color, perfect-bound magazine all about "military specifications," primarily dealing with the armament and equipment of the ground soldier. Issue no. 1 focuses on the U.S. Army and the tools of their trade. Features stories on the real weapons, plus plenty of coverage of toy guns (the only kind available in Japan!). All text is in Japanese. Gun-believably gun-tastic!