I was not able to take that wide range screenshot in just 1920x1080 so i edited this its just understandable.
please anyone answer its urgent!
On the left screenshot, you need to use Range instead of Damage when you multiply the ForwardVector
On the right screenshot, you need to drag a pin off CurrentBP and use Set Weapon info, then set your new weapon ammo. You subtracted one from the current ammo, which is good, but you didn’t set it