Granade Script

[Qaksito]

Hi people.
I need a good granade script for my game. the actual script what i'm using is this:

public class BulletSc : MonoBehaviour
{
[SerializeField] public Rigidbody rb;

[SerializeField] public GameObject
bulletGo,
explosionEffect;

[SerializeField] bool
useGrav,
collisionExplosion;

[SerializeField] float
explosionCoundown,
explodingTime,
explosionRadius,
explosionForce;

float explosionTime, isExplodingTime;

GameObject ignore;

bool isExploding;

void OnEnable(){
    isExploding = false;
    explosionTime = Time.time + explosionCoundown;
    rb.useGravity = useGrav;
    bulletGo.SetActive(true);
    explosionEffect.SetActive(false);
}

void Update(){
    if(explosionTime < Time.time && !collisionExplosion && !isExploding){
        isExplodingTime = Time.time + explodingTime;
        isExploding = true;
    }

    if(isExploding && isExplodingTime < Time.time)
        this.gameObject.SetActive(false);

    if(isExploding)
        Boom();  
}

void OnCollisionEnter(Collision col){
    if(ignore == null && col.gameObject.tag == "Weapone")
        ignore = col.gameObject;
    
    if(col.gameObject != ignore && collisionExplosion){
        isExplodingTime = Time.time + explodingTime;
        isExploding = true;
    }
}

void Boom(){
    rb.useGravity = false;
    rb.velocity = new Vector3(0,0,0);
    bulletGo.SetActive(false);
    explosionEffect.SetActive(true);
    
    Collider[] colliders = Physics.OverlapSphere(transform.position, explosionRadius);
    foreach(Collider nearbyObject in colliders){                
        Rigidbody noRb = nearbyObject.GetComponent<Rigidbody>();
        if(noRb != null && noRb != rb){
            noRb.AddExplosionForce(explosionForce, transform.position, Mathf.Lerp(0, explosionRadius, explosionTime * 2));
        }
    }
}

}

but, the character controllers are not included, and this method of explosion isn't realistic