Standard Propulsion: No, this requires 10 Capacity, the Nightwing only has 4.
Signature Masking: The NIghtwing actually comes with this standard at Rating 4. (page 155 of Rigger 5.0, core vehicle modifications)
Weapon Mount: A heavy weapon mount takes up 4 capacity, so the Nightwing has space for this, but it has to be an External, Remote operated, Rigid-mounted one. Which means it can only fire straight forward, and it is completely obvious.