Probably based on the British Rapier missiles with "blind fire" radar tracking:
To ensure accuracy, Blindfire used a very narrow "pencil" beam and tracks both the target and missile. To allow the operator to monitor the Blindfire system when it was tracking the target, the existing optical tracker was slaved to the Blindfire radar, although it was possible for the optical tracker to be manually "laid on" a second target whilst the Blindfire engages the first target.
The Weapon Master of Razin's version wouldn't need the optical tracker slaved as it would be built into her visual display to track the missile with much more precision and accuracy. She is able to shoot at least thirty at a time as she did at D with her Electronic Barrier up which were gobbled up by Left Hand. Greed heard she has at least two hundred total.