If the casualty is responsive and able, direct them to return fire, move to cover (if possible), remind them to remain engaged as a combatant (if appropriate), and self-apply a tourniquet if able or when tactically feasible. 

They should use a CoTCCC-recommended tourniquet for life-threatening hemorrhage amenable to a limb tourniquet, applied “high and tight” as quickly as possible to stop bleeding (within 1 minute, ideally), and then re-engage in establishing fire superiority.

If the casualty is unable to move, have them re-engage in helping to establish fire superiority, if possible, and depending on the tactical situation, they may still be able to apply self-aid without significant risk of exposing themselves to the risk of additional injuries.