Iran didnt stop developing arsenal and several huge projects are undergoing development and testing but it takes time as its a complex technology.Sejil missile was unveiled from a short time and before that the shahab-3 in 2003.
Dont forget that Iran now is looking forward to build more advanced weapons especially missiles but its now concentrating on providing the new missiles with technology wasnt in previous missiles arsenal before so it needs more time.
JUST WAIT!
