Grenade Data Location

Grenade data is now on Grenade.cs and not on Weapon.cs.
You need both scripts to make a grenade work

Assets/Scripts/Weapons/Grenade.cs

@@ -4,17 +4,30 @@ using UnityEngine;
 
 public class Grenade : MonoBehaviour
 {
-    [SerializeField] GameObject explodeParticle;
-    [SerializeField] Weapon weapon; 
+
+    [Header("Grenade Info")]
+    [SerializeField] float timer = 2f;
+    [SerializeField] float explosionForce = 500f;
+    [SerializeField] float grenadeRadius = 3f;
+    [SerializeField] bool hasExploded = false;
     private float countdown;
 
+    [Header("Explosion GameObject")]
+    [SerializeField] GameObject explodeParticle;
+    
+    [Header("Scripts")]
+    [SerializeField] Weapon weapon; 
+
+    [Header("Debug")]
+    [SerializeField] bool showExplosion = true;
+
     void Start() {
-        countdown = weapon.Timer;
+        countdown = timer;
     }
 
     void Update() {
         // If grenade has been thrown and countdown is over 0 and grenade has not exploded yet
-        if (weapon.HasBeenThrown && !weapon.HasExploded) {
+        if (weapon.HasBeenThrown && !hasExploded) {
             // Decrease timer by 1 second
             countdown -= Time.deltaTime;
             // If countdown get to 0... BOOM!:
@@ -28,13 +41,17 @@ public class Grenade : MonoBehaviour
 
     /* - Spawn explosion particles and add force to nearby objects - */
     private void Explode() {
-        // Spawns explosion particle
-        GameObject spawnedExplosion = Instantiate(explodeParticle, transform.position, transform.rotation);
-        // Destroys explosion particle after on second
-        Destroy(spawnedExplosion, 1);
+        if (showExplosion)
+        {
+            // Spawns explosion particle
+            GameObject spawnedExplosion = Instantiate(explodeParticle, transform.position, transform.rotation);
+            // Destroys explosion particle after on second
+            Destroy(spawnedExplosion, 1);
+        }
+        
 
         // Gets all collider that are in a sphere around the grenade
-        Collider[] colliders = Physics.OverlapSphere(transform.position, weapon.GrenadeRadius);
+        Collider[] colliders = Physics.OverlapSphere(transform.position, grenadeRadius);
         // Iterate over all colliders found in radius
         foreach(Collider nearbyObject in colliders) {
             // Check if nearby object is a Player and if Collider is not a CharacterController (can be changed to CapsuleCollider)
@@ -47,11 +64,11 @@ public class Grenade : MonoBehaviour
                 // if rigidbody exists...
                 if (rb != null) {
                     // adds force to nearby objects
-                    rb.AddExplosionForce(weapon.ExplosionForce, transform.position, weapon.GrenadeRadius);
+                    rb.AddExplosionForce(explosionForce, transform.position, grenadeRadius);
                 }
             }
         }
-        weapon.HasExploded = true;
+        hasExploded = true;
         // Destroys grenade
         Destroy(gameObject);
     }