system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars ROTJ] Did R2 already have a built-in lightsaber launcher, or did Luke have to do it as a custom add-on?
gpt
Probably built-in. Maybe Anakin already built one for R2 during the clone wars. Maybe R2 just adapted one of his existing "arms" for this purpose. R2's so old and has gone through so many upgrades that at this point, it's better to ask which devices he *doesn't* have.

Funnily enough, for a droid who's been in combat for so long, R2 doesn't have dedicated weapons like blasters or explosives. The deadliest move in his arsenal is to pour out an oil slick and light it on fire with his blowtorch.