I have two guns and I want only one gun to shoot which I have picked

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C#

game

Unity2D

i have two guns and two different functions for it. i want that gun to shoot which I have picked. but even other guns is shooting that I haven't picked
so someone please solve this issue.

public class weapon  : MonoBehaviour
{

    public Transform firepoint1; //this is a firepoint
    public Transform firepoint2; //this is a firepoint

    public GameObject bulletprefab;
    public GameObject f;
    public GameObject f1;

    // Start is called before the first frame update
    void Start()
    {
        Rigidbody2D rb = GetComponent();
        rb.constraints = RigidbodyConstraints2D.FreezeRotation;

    }

    // Update is called once per frame
    void Update()
    {
        
         
    }
     void shoot()
    {
     
        //shoot
        
        
            Instantiate(bulletprefab, firepoint1.position, firepoint1.rotation);




    }
    void shoot1()
    {
        
            Instantiate(bulletprefab, firepoint2.position, firepoint2.rotation);


    }
    void OnTriggerStay2D(Collider2D trig)
    {
     


        if (f.gameObject != null && gameObject.tag =="player")
        {
           

            if (Input.GetButtonDown("Fire1"))
            {
                shoot();
            }
      
        }
        if (f.gameObject != null && gameObject.tag == "player")
        {
            

            if (Input.GetButtonDown("Fire1"))
            {
                shoot1();
            }
        }
    }
}

What I have tried:

i have tried lots of things so someone please solve this issue