Restricting rotation on an axis

Okay, So I have a turret. On this turret the base rotates around the Y axis, facing the target and the GUN the sort of barrel of the turret which is a separate game object rotates on the X axis facing the target. This works beautifully, my only issue comes in when I try to restrict the turrets rotation. If you look at the photo I included (Sorry it's so rough) I want the turret to be able to look at the target from 0-45 X so that it doesn't look into the floor and so that it never has to look straight up.

Here is my Code:

 using UnityEngine;
 using System.Collections;
 
 public class TurretTargeting : MonoBehaviour {
     GameObject turretBase;
     GameObject turretGun;
 
     public Transform target;
 
     public bool clamp;
     public float c1, c2;
 
     private float x = 0.0f;
 
     // Use this for initialization
     void Start()
     {
         turretBase = transform.FindChild("Turret_Base").gameObject;
         turretGun = turretBase.transform.FindChild("Turret_Gun").gameObject;
         x = turretGun.transform.eulerAngles.x;
 
     }
 
     // Update is called once per frame
     void Update()
     {
 
         if (target != null)
         {
             Vector3 dir = target.transform.position - turretBase.transform.position;
             Vector3 dir1 = target.transform.position - turretGun.transform.position;
 
             Quaternion lookRot = Quaternion.LookRotation(dir);
             Quaternion lookRot1 = Quaternion.LookRotation(dir1);
 
 
             //This doesnt work at all.
             if (clamp)
             {
                 x = ClampAngle(x, -c1, c2);
                 lookRot1.x = x;
 
             }
 
             turretBase.transform.rotation = Quaternion.Euler(0, lookRot.eulerAngles.y, 0);
             turretGun.transform.localRotation = Quaternion.Euler(lookRot1.eulerAngles.x, 0, 0);
             //-----------------------
             
 
         }
         else
         {
             turretBase.transform.rotation = new Quaternion(0, 0, 0, 0);
             turretGun.transform.rotation = new Quaternion(0, 0, 0, 0);
         }
     }
 
     float ClampAngle(float angle, float min, float max)
     {
         if (angle < -360)
             angle += 360;
         if (angle > 360)
             angle -= 360;
 
         return Mathf.Clamp(angle, min, max);
     }
 }
 
 

I have been trying to wrap my head around this for hours with no results, so if anyone has any solutions please help.

Photo I Mentioned.