SweepMultiByChannel

Use SweepMultiByChannel to AddImpulseAtLocation to Create A Grenade Effect

Optional: add Niagara to your Build.cs file to spawn an explosion on hit.
Optional: Create a simple Niagara explosion.
Optional: After code compiles add a sound effect and Niagara system to the projectile Blueprint. I added the Explosion01 Audio file from the Starter Content found here (StarterContent/Audio/Explosion01) and A Simple Explosion Niagara System I created in Step 2. The Projectile Blueprint can be found here Content/FirstPersonCPP/Blueprints/FirstPersonProjectile