Shooter Game Fire Action

Hello Guys,
i am planning to implement some features and updates to “Shooter Game” sample(Not FPS template). I am trying to call fire function from BP but the firing system is quite complex on the sample. There are functions like StartFire(), SimulateWeaponFire() etc. Does anyone has any idea how can i call the firing in Pawn BP?

StartFire() is the one you call, and StopFire() when finished.

Thank you TheJamsh!