Raven is a light (35-ton) 'Mech, favored by the Inner Sphere for its electronic warfare capabilities. As such, it has become very famous as a reconnaissance 'Mech. It was first produced in Capellan Confederation.
Raven carries ECM suite, active probe, Target Aquisition Gear for artillery strike coordination, and NARC missile beacon launcher.
It isn't much weapon- or armor-wise, though - it has SRM-6 and a couple of medium lasers, that's all.
See also BattleTech.