It does when they try to copy the MFR markings on the product, packaging and manuals/directions.
They could contact the OEM and say "listen, we are going to make an AS copy and mark it as a copy of XX" This would go a long way to stop people buying something they didn't want and possible legal issues.
A lot of the time the manufacturers
do seek and buy liscenses to put on authentic markings onto parts and guns.
Tokyo Marui (a major airsoft manufactor) has P226 and P228 series that are fully lisenced and endorsed by Sig Sauer, and they the 550 is liscensed from Swiss Arms.
Western arms has full liscenses from Colt (1911 and 2011 series), SVI (2011), Beretta (92 series), and S&W (Sigma).
Classic Army has gotten really good at this. Licenses from Armalite and LWRC. Steyr mannlicher upped the ante too with the CA AUG. Not only fully liscensed, CA got permission to use the same glass reinforced nylon polymer that is used in the real steel version.
When I used to play airsoft the parts never fit on my real steel m4. now it seems it has the same scale.. I know stocks did not fit or front ends. back in the late 90's
Systema changed the rules with the release of their PTW. Almost anything you could put on a real steel M16 would fit onto the PTW. There were reports of bad upper recievers so the airsofters would buy worn out or unwanted AR15 upper recievers (aka: cheap ones), do maybe two minutes of dremel work and then put all the other parts back on.
Now these suckers cost $2000+ each but they've sold just as well as the $400 inexplicably. Systema marketed it effectively and the other manufactures caught wiff of how the wind was blowing and starting modifying parts and bodies to accept minor real steel parts such as mag release buttons, rails, handguards, etc.
And before yuo ask... I refuse to pay more money for a basic airsoft gun then buying a real gun AR15 and two cases of ammunition. It's just plain stupid.