Title. Basically, use the Brimstone Claymore, for example, and try to use a RPG Series book (lets just say RPG series Warrior, the Whirlwind ability for example). That move involves multi-hits. It does not proc the unique effect of "On Hit" from the Brimstone Claymore. To be more specific, it does not proc any unique effects from any on hit weapon at all. Only M1s do. This compatibility would be amazing for RPG Series.