In N5 the Pheroware Tactic Endgame sits in a weird spot as the only Disposable (2) weapon in the game that also natively has a Burst 2 value. In the rulebook it's explained how to use and expend the Disposable weapons when the Burst value is modified, but nowhere is explained what to do when the Burst value is already higher than 1 on its own. How do we use it?
Probably up for an errata, it's likely that it should be Disposable (2), B1, Double Shot like the other similar weapons in N5. For now, RAW, it's B2 in active, B1 in ARO, and uses one "charge" per Attack regardless, so if you use it once in ARO and once in active, you'll be B1 in ARO, B2 in active, and then Unloaded. It's probably worth checking with your opponent. If they don't like playing it as currently written, treat it like B1 Double Shot, it's the simplest fix.