Proton cannon. It has unlimited ammo, a fast firing rate, it's fairly effective and it doesn't take much room. In my humble opinion, three proton cannons make Shuttlecraft a worthy adversary for any ship in standard EV, with or without the Monty Python maneuver.
Javelins might be pretty effective too, but I've never liked weapons that use up ammo.
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"I don't say yes or no, more like the other way around"
Ankh Starrunner, The Diamond Blaster