If the GM says you have "weapons", without specifying exactly what sort of weapons they are, this is of course effectively an open invitation to use whatever weapons you desire.

The general principle is that vagueness of description is your friend. If the GM didn't specify something precisely, feel free to interpret it in whatever way is most advantageous for your character. After all, the GM didn't say it wasn't like that! This will either get the GM tied in knots of legal-level complexity when offering descriptions, to the point where they can't keep things straight any more, or convince them to simply let you get away with whatever deviousness you have in mind. Either way is a win.

Transcript

Obi-Wan: We need to find the ship with Palpatine on it.
Anakin: I reach out with the Force, searching for fear and outrage.
GM: Roll.
Anakin: 11.
GM: You sense the desperation of a trapped mind. This ship, here on the map. As if in response, ships start firing at—
R2-D2: I vector our approach to bring the most targets of opportunity into the range of our laser cannons.
GM: Actually—
R2-D2: We do have weapons this time, right? Right?
GM: I was going to say that the sky is so full of ships that you don't need to worry about finding targets.
GM: And you do have weapons. Of course. And—
R2-D2: Awesome! I fire a light spray of tactical antimatter warheads with our railguns.
GM: No.