“The media industry” is everything from a big-budget science fiction film, which uses no conventional-looking weapons at all, to a local newscast, which also doesn’t.
The number of productions worldwide needing realistic-looking prop weapons is very unlikely going to make any manufacturer justify redesigning their arms or recalibrating their manufacturing equipment, if recalibration is all that is necessary and new equipment wouldn’t also be required.
In the 80’s movies were the biggest export of USA. IDK how big exactly it is today, but globally it’s very big.
I’m not sure why you think that means the market for realistic prop guns is worth the cost of redesign and recalibration and possibly the purchase of new equipment.
Only a few companies make those movies, so they only need a limited stock of those weapons, especially since they can be reused. Most movies don’t require them.
Also, I can find absolutely nothing to corroborate your claim that movies were America’s biggest export in the 1980s. They aren’t even in the top 10 now, so I doubt it.
Maybe it wasn’t movies by itself, but also other entertainment? But for sure neither oil gas or Automobile were very significant exports back then. Also your list look to be goods only and contain zero services. Entertainment is a service, and will NEVER make that list.
From your link:
The trade deficit continues to grow in the U.S. due to the heavy reliance on foreign manufacturing.
But it would also be usable for theater, and TV shows.