change angle towards direction

I want to deflect/reflect my bulltet, so I used rays to get the incident ray , the normal and made a function that reflects the ray and returns a new vector3. I got the new vector but I don't know how to make the bullet have the same direction of the vector (blue ray). How can I do so? I tried Quaternion.FromToRotation and other functions and they didn't worked.

Here is the code to understand more what's happening:

 using UnityEngine;
 using System.Collections;
 
 public class BulletBehavior2D : MonoBehaviour {
     public bool isEnabled;
     public float speed;
     public bool bounceOff;
     public float rayLength;
     private Ray2D ray;
     private RaycastHit2D hit;
 
     // Use this for initialization
     void Start () {
 
     }
     
     // Update is called once per frame
     void Update () {
 
         ray = new Ray2D (new Vector2 (transform.position.x, transform.position.y), new Vector2 (transform.right.x, transform.right.y));
         RaycastHit2D hit;
         Debug.DrawRay (ray.origin, ray.direction * rayLength);
         hit = Physics2D.Raycast (ray.origin, ray.direction, rayLength);
 
         if (isEnabled) {
             transform.position += transform.right *  Time.deltaTime * speed;
         }
         if (hit != null) {
             Debug.DrawRay (hit.point, hit.normal * rayLength,Color.red);
             Vector3 reflect = BulletBehavior2D.Reflect(transform.right,hit.normal);
             Debug.DrawRay (hit.point, reflect * rayLength ,Color.blue);
         }
 
 
     }
 
     public static Vector3 Reflect(Vector3 vector, Vector3 normal)
     {
         return 2.0f * (normal * -Vector3.Dot(vector, normal)) + vector;
     }
     
 
     void OnTriggerEnter2D(Collider2D coll) {
 
         Vector3 reflect = BulletBehavior2D.Reflect(transform.right,hit.normal);
         Vector2 rf = reflect;
         /**here the reflection and change of angle should occur ! **/
 
    }
 }