Slayer Fighter SL-15
Insignia:
The insignia of the Federated Commmonwealth RCTs is a hybrid of that used by the Federated Suns and Lyran Commonwealth; the backdrop is the Davion Sunburst, over which is the mailed fist of House Steiner, and in front that the Davion Sword. The regimental insignia depicts a black rat on a white disc.
Per FM:Federated Suns, pages 90 and 93.