Enable field system plugin
Create the fracture mesh
Go to Fracture mode, create the fracture same as from below
Create where the mesh fracture
Tick Show Engine Content in Content Broswer
Select FS Anchor Field Generic and drag overlap the fracture mesh in the scene
(overlap the mesh to let the mesh not fracture)
Choose the object again, at initialization fields, add array element, use the dropper to choose the anchor field box in the scene
Drag the FS master field at the fracture, place where the fracture want to start to crush
play aroundthe fs masterfield setting for delay time, activation type, field settings, etc
Create the interaction for the mesh to fracture (force applied to crash the object)
Go to BP 1st person projectile (if for shooting bullet), or 3rd person BP
Create custom event called Add Force
For 1st person projectile BP:
Add follow in physics impulse command
For 3rd person BP:
Add follow in the attack/trigger system
Back to FS masterfield, set activation type to trigger