A TROPHY ROOM FULL OF TOYS: Colossal Stamina. During force construction, you may include up to 3 Equipment-Objects that each cost 10 points or less in your Sideline. When placing objects during game setup, you may place one of these objects in addition to your other placed objects.
From Punisher Weapons:
PUNISHER WEAPON: Can only be added to your starting force if the WK #MP16-004 Punisher Van or a character named Punisher is included in your force.
Can I include a Punisher Weapon on my sideline via Maestro's trait without having Punisher Van or Punisher on my starting force?