Two different R242 Trestrol wagon rocket loads launched (pardon the pun).
Option 1) Three cradles holding a total of 16 of the small rockets that can be launched from the Tri-ang R343 rocket launcher wagon
Option 2) Three cradles, two holding a total of 8 of the small rockets for the R343 rocket launcher and two larger fictitious rockets
Add some extra firepower to your battle space train with these extra rocket loads