How bind projectile from TPSCharacter to specific weapon

Hi everybody. Please help. My problem is:
I’ll make… a weapon very same with Van Helsing’s crossbow. Model is different, but that not matter. And ill make projectile like that:


Its worked, but… And in that but all of problem. No matter what weapon take the character, or even take it him or not, with every push on fire button from socket fly projectiles.
Can someone explain, how bind that kind of projectile (becouse i planned add two more) to specific weapon?