Sure, but there is a much simpler point here. The spherical cow of GSF is a dead-center motionless target with no evasion and no cooldowns, AKA damage per shot times rate of fire times (1 + crit / 2), times accuracy if you want to get fancy. In this model, LLC has the highest DPS. But most refinements you make to this model are going to hit LLC harder than its competitors. Small firing windows? Massive reduction in LLC's modeled DPS, little or none to BLC. And so on.