Why is my gun stretching out when I pick it up?

When my gun is picked up, the transform changes from 0.02 on all axes to 1 on all axes. If it helps, here is my pick up system script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PickUpSystem : MonoBehaviour
 {
     public GunSystem gunScript;
     public Rigidbody rb;
     public BoxCollider coll;
     public Transform player, gunContainer, fpsCam;
 
     public float pickUpRange;
     public float dropForwardForce, dropUpwardForce;
 
     public bool equipped;
     public static bool slotFull;
 
     private void Start()
     {
         //Setup
         if (!equipped)
         {
             gunScript.enabled = false;
             rb.isKinematic = false;
             coll.isTrigger = false;
         }
         if (equipped)
         {
             gunScript.enabled = true;
             rb.isKinematic = true;
             coll.isTrigger = true;
             slotFull = true;
         }
     }
 
     private void Update()
     {
         //Check if player is in range and "E" is pressed
         Vector3 distanceToPlayer = player.position - transform.position;
         if (!equipped && distanceToPlayer.magnitude <= pickUpRange && Input.GetKeyDown(KeyCode.E) && !slotFull) PickUp();
 
         //Drop if equipped and "Q" is pressed
         if (equipped && Input.GetKeyDown(KeyCode.Q)) Drop();
     }
 
     private void PickUp()
     {
         equipped = true;
         slotFull = true;
 
         //Make weapon a child of the camera and move it to default position
         transform.SetParent(gunContainer);
         transform.localPosition = Vector3.zero;
         transform.localRotation = Quaternion.Euler(Vector3.zero);
         transform.localScale = Vector3.one;
 
         //Make Rigidbody kinematic and BoxCollider a trigger
         rb.isKinematic = true;
         coll.isTrigger = true;
 
         //Enable script
         gunScript.enabled = true;
     }
 
     private void Drop()
     {
         equipped = false;
         slotFull = false;
 
         //Set parent to null
         transform.SetParent(null);
 
         //Make Rigidbody not kinematic and BoxCollider normal
         rb.isKinematic = false;
         coll.isTrigger = false;
 
         //Gun carries momentum of player
         rb.velocity = player.GetComponent<Rigidbody>().velocity;
 
         //AddForce
         rb.AddForce(fpsCam.forward * dropForwardForce, ForceMode.Impulse);
         rb.AddForce(fpsCam.up * dropUpwardForce, ForceMode.Impulse);
         //Add random rotation
         float random = Random.Range(-1f, 1f);
         rb.AddTorque(new Vector3(random, random, random) * 10);
 
         //Disable script
         gunScript.enabled = false;
     }
 }

If anyone could help me that would be great :)