I want to find the radius the character wields

I want to find the radius the character wields…
SaveAngle = UKismetMathLibrary::Acos(UKismetMathLibrary::Dot_VectorVector(Start.GetSafeNormal(), End.GetSafeNormal())) * (180 / UKismetMathLibrary::GetPI());
my corde… fixpleas…