My dad read True religiously for decades until it faded away. As a young kid I recall reading one of their articles about the new AR15 being developed for the Air Force and possible use in the new Vietnam war as the then current M14 was too long and heavy for jungle operations.
Another article was about Bell’s new turbine helicopter (the UH-1 Huey) and how my dad thought the turbine engines exhaust help the forward propelling of the aircraft.
There were several “mens” magazines out there at the time. Today I don’t know what passes for a man’s magazine, unless it would be one of those that specialize in hot women.