If Orbital ATK build Pegasus XL in KSP
Pegasus and it's successor the Pegasus XL is the first commerial rocket that reached orbit. Even thought it has similar payload capacities as some other small sat launch vehicles, Pegasus is to expensive to compete with the others. There are only a few rockets and therefore launches left and the program seems to have shut down.
Today's guessing Question:
What is the difference between real Pegasus and this recreation?
Hint: Belly of Aircraft.
Answer in the comment section!
The Rocket was replicated in Kerbal Space Program.
No mods were used, but DLC's might be required.