I remember things turning after this movie came out
Before this film 95% of gun shows were hunting rifles, competition rifles, sporting shotguns, Revolvers and bullseye 45s. Throw in 5% Army Surplus stuff with Ar15s, AKs, etc.
With in a couple years seemed like every po-dunk police dept, suddenly needed a SWAT Team with MP5s. Black outfits, tactical this and that really became a selling point.
Perception of shooting and gun ownership noticeably started to shift.
Now there could have been other things, but that specific film seemed to get an incredible amount of play and sway with the American gun culture Think of the 80s survivalist guys who started dressing like SAS.
It helped sell a lot of Soldier of Fortune Magazines too I'll bet.
It propelled on from there. Now guns shows seem like 95% military shit. Bunch of morons srewing shit on the side of their AR15s calling it a build!
Add in more movies over the years, more video games, the 4H rimfile clubs started thinning out. After a while the competitive shooting side of gun ownership in America began to shrink, kids got more interested in other shit, so when they did think about guns, what became more predominant was the ARs, AKs, etc that got more coverage, (be it pro or con).