Shooting 1 raycast which hits the object 6 times

I’m working on a first person shooter and I’m using raycasts for the bullets. When I shoot one raycast it hits the object 6 times. I don’t know why it’s doing this. Here is the code:

using UnityEngine;

public class RaycastShooting : MonoBehaviour
    public int damageperbullet;
    public float fireringrate;
    public int bulletnumber;
    public float forceaplied;
    public float recoil;
    public float playerknockback;
    public float ammoamount;
    public float clipsize;
    public float currentammoinclip;
    public float accuracy;
    public float reloadspeed;
    float range = 1000f;
    public Camera camera;
    public GameObject player;

    void FixedUpdate() {
        if (Input.GetButtonDown("Fire1")) {

    void Shoot() {
        //for (int i = 0; i < bulletnumber; i++) {
        RaycastHit hit;

        //determines at what angle the bullet will leave the barrel
        Vector3 angleofshot = new Vector3 (Random.Range(-accuracy, accuracy), Random.Range(-accuracy, accuracy), Random.Range(-accuracy, accuracy));

        //pushes the object which was shot if it has a Rigidbody
        if (Physics.Raycast(camera.transform.position, camera.transform.forward + angleofshot, out hit, range)) {

            if (hit.transform.GetComponent<Rigidbody>() != null) {
                hit.transform.GetComponent<Rigidbody>().AddForceAtPosition(camera.transform.forward * forceaplied, hit.transform.position);

            Health objecthealth = hit.transform.GetComponent<Health>();

            if (objecthealth != null) {

        //adds knockback to the player
        player.GetComponent<Rigidbody>().AddForce(-camera.transform.forward * playerknockback);

I am new to unity so sorry if this is a feature that I don’t know about.

It’s probably due to calling GetButtonDown during FixedUpdate instead of Update. The raycast hits once each time, but you shoot 6 times in a row from 1 press. See the docs at Unity - Scripting API: Input.GetButtonDown for an explanation. This is a common problem.