Unity gun flipping - visual-studio

Question

I'm making a top down shooter game and when I point my gun backwards, it is upside down. Here's my player script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Player : MonoBehaviour
{
public float moveSpeed = 5f;
public Rigidbody2D rb;
public Camera cam;
Vector2 movement;
Vector2 mousePos;
public GameObject crossHair;
public SpriteRenderer sr;
void Start() {
Cursor.visible = false;
}
// Update is called once per frame
void Update()
{
sr = GetComponent<SpriteRenderer>();
rb = GetComponent<Rigidbody2D>();
movement.x = Input.GetAxisRaw("Horizontal");
movement.y = Input.GetAxisRaw("Vertical");
mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
crossHair.transform.position = new Vector2(mousePos.x, mousePos.y);
}
void FixedUpdate()
{
rb.velocity = new Vector2(movement.x, movement.y) * moveSpeed;
Vector3 lookDir = mousePos - rb.position;
lookDir.Normalize();
float angle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg;
rb.rotation = angle;
if (transform.position.y >= 6.4f) {
transform.position = new Vector2(transform.position.x, 6.4f);
}
if (transform.position.y <= -6.4f) {
transform.position = new Vector2(transform.position.x, -6.4f);
}
if (transform.position.x >= 11.9) {
transform.position = new Vector2(11.9f, transform.position.y);
}
if (transform.position.x <= -11.9) {
transform.position = new Vector2(-11.9f, transform.position.y);
}
float z = transform.rotation.eulerAngles.z;
if (z > 0 && z < 180 && !sr.flipX)
sr.flipX = true;
else if (z < 360 && z > 180 && sr.flipX)
sr.flipX = false;
}
void Flip(){
Vector3 Scaler = transform.localScale;
Scaler.y *= -1;
transform.localScale = Scaler;
}
}
I've searched a lot but I couldn't make it work. I tried with spriteRenderer but it doesn't work either. I really need help.(Btw my player rotates with the player)

Answer 1

Sounds to me like your system is just rotating the object without a second though for what direction it's facing. I imagine if you put an arrow or triangle pointing in the direction you like instead of a gun, it would look just fine.
So what I would do is the following:
if (the rotation is backwards)
render the sprite flipped vertically
else
render the sprite normally