Indeed from studying images of S-300 and HQ-9 Launcher this Iranian Launcher seems to lack alot of machinary at the rear and underside of the vehicle and to me the launcher just doesnt look beefy enough to be able to carry such weight and be very mobile but thats just my opinion from looking at S-300 launchers. The Tubes do seem real though (or very well made mockups)..But the lack of corresponding Radar TELs does make one wonder (which are equally important)...So overall I think this is a Mockup but indeed there is great value in such mockups. I honestly don't believe Iran has the missile tech just yet to build an S-300 missile (unless the Russians directly aided them) but I believe Iran could be planning on building its own launchers to quicken deployment of the S-300 system. And even if this is just propaganda, its a great example of the kind of propaganda you want. It makes the enemy wonder and while they may doubt its validity, they will still be a bit worried. Just my thoughts..
I do not think Iranian military just put up a fake S-300 for the show. This has been the usual routine, like the claim to be able to enrich to 20% or the second generation of centrifuges.
I think Iran within 6 months in the next major military exercise will show a couple of lunches to make all the skeptics realize how deadly these fake S-300 rockets can be.
Also if this follow history is of Iran's previous announcements, Iran is already mass-producing this S-300 and acknowledges the prototypes maybe a year after the actual success of prototyping it.
From Israel and US point of view this system is even more dangerous than S-400 since there is no way to know their capabilities. The only way to find out is to lose a few aircrafts in actual battles to find out a way to neutralized them and then Iran can modify them and the story will repeat itself.
Iran is indeed a superpower not because of its military power, but because of creativity of her engineers.
Congratulation to the Iranian team of engineers. Even if 100% of the work is done through reverse engineering, this is a major achievement.