system
Given the following post, respond as if you're commenting on Reddit:
human
[The Culture] What types of weaponry did the Idirans use against Culture ships/habitats and how effective were they?

Haven't read Consider Phlebas in half a year. What types of weapons were used by the Idirans? I'm thinking of rereading the Culture books soon.
gpt
The Idrians were only just barely behind The Culture in tech. They were able to and did use Gridfire. Aside from that, it'd be the standard variety of exotic lasers, kinetic energy weapons, collapsed antimatter, effectors and displacers.