While Firo definitely doesn't look like the armor-wearing type, Rey isn't about to make assumptions about people she's just met.

That's when he seems to make the evident assumption that she was undermining him a moment ago, and she just stares. How in the hell did he get to that conclusion--?

Oh.

"You're mistaken, was not calling you weak. Am just not something that needs weapons like people--" She shakes her head as she tries to avoid yet another misconception. "--like many people do. Though they can be helpful at times."

It seemed better than using any of the weapons from Rage's arsenal, since she doesn't have any formal training in any of those things.