枪弹射错方向，射出2发子弹

Question

我是 Unity3D 引擎的新手。 我正在创建由非 Ray Casting 制成的小型枪械游戏。 当我开枪时，子弹向上移动，一次射出 2 发子弹（一次单击） 。

我不知道是怎么回事！

这是视频文件：

https://drive.google.com/file/d/1SeT9eLcly9Wv551mSy4bnEpgI8E1FL5l/view?usp=sharing

这是代码：

射击子弹.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ShootingBullet : MonoBehaviour
{
    // Start is called before the first frame update
    public Transform spawnPoint;
    public GameObject bullet;
    public float speed = 5f;
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        //Debug.Log("working");
        if (Input.GetButtonDown("Fire1")) //
        {
            ShootBullet();

        }

    }

    private void ShootBullet()
    {
        GameObject cB = Instantiate(bullet, spawnPoint.position, bullet.transform.rotation);
        Rigidbody rig = cB.GetComponent<Rigidbody>();

        rig.AddForce(spawnPoint.forward * speed, ForceMode.Impulse);
        
    }
}

BulletScript.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BulletScript : MonoBehaviour
{
    private void OnCollisionEnter(Collision collision)
    {
     // Destroy(gameObject);
           //Debug.Log("working");
       
    }

}