Making a FPS, my gun floats sideways in front of me?

 var cameraObject : GameObject;
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 var targetXRotation : float;
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 var targetYRotation : float;
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 var targetXRotationV : float;
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 var targetYRotationV : float;
 
 var rotateSpeed : float = 0.3;
 var holdSide : float = - 0.5;
 var holdHeight : float = 0.5;
 var holdLength : float = 0.5;
 
 
 function Update () {
     transform.position = cameraObject.transform.position + (Quaternion.Euler(targetXRotation, targetYRotation, 0) * Vector3(holdSide, holdHeight, holdLength));
     
     targetXRotation = Mathf.SmoothDamp( targetXRotation, cameraObject.GetComponent(MouseLook).xRotation, targetXRotationV, rotateSpeed);
     targetYRotation = Mathf.SmoothDamp( targetYRotation, cameraObject.GetComponent(MouseLook).yRotation, targetYRotationV, rotateSpeed);
 
     transform.rotation = Quaternion.Euler(targetXRotation, targetYRotation, 0);
 }

Here's what it ends up looking like:

I Have tried for hours to try and fix this, and I am also new to coding so talk to me like I know nothing. The script on the right is my script for my mouse aiming/looking in case that's also needed. Please help! Been stuck for a month and have re-scripted 3 times to try and fix this.