How can I keep my ammo count going over the cap?

I'm trying to keep the ammo from exceeding it's max count of 10/10 on the HUD.

 using UnityEngine;
 using System.Collections;
 
 public class ShipPlayerController : MonoBehaviour {
            
     // The max ammo the player start with
     [SerializeField] int MaxAmmo = 10;
     // The current ammo remaining for the player
     private int CurAmmo = 10;
     
     // The max health the player start with
     [SerializeField] int MaxHealth = 3;
     // The current lives remaining for the player
     private int CurHealth = 3;
     
    
 
     // Use this for initialization
     void Start () {
         ResetStats();
          
     }
     
     // Update is called once per frame
     void Update () {
         UpdatePosition();
         UpdateFiring();
 
     }
     // Assign the "stat" variables their defualt values
     void ResetStats() {
         numShotsFired = 0;
         numEnemyHits = 0;
         // MaxAmmo is pulic and set in the editor
         CurAmmo = MaxAmmo;
         
         // MaxHealth is public and set in the editor
         CurHealth = MaxHealth;
      
         PlayerHUD.CreateHpIcons(MaxHealth);
         // Tell the how many health icons should be active
         PlayerHUD.updateHp(CurHealth);
         // Tell the HUD to create Ammo count
         PlayerHUD.updateAmmo(CurAmmo);
        

         
  
     }
     // Modify the active ammo count by passed value
     public void ModAmmo(int _value) {
         CurAmmo += _value;
         // Update the new ammo value to the HUD
         PlayerHUD.updateAmmo(CurAmmo);

     }
     public void ModHealth(int _value) {
         CurHealth += _value;
         // Tells the hud how many health icons should be active
         PlayerHUD.updateHp(CurHealth);
    
     // Handles the spawning of the projectile
     void DoWeaponFire() {
         
         print("The \"DoWeaponFire\" function has been called!");
         // Create a new instance of the bullet and place it at the location
         // of the player.
         Instantiate(Bullet, transform.position, transform.rotation);
         ModAmmo(-1);
     
     }
     void OnTriggerEnter(Collider other) { 
         // What type of object did we collide with?
         if (other.tag == "Pickup")
         {
             if (other.name == "Score")
             {
                 // Reward some points
                 ModScore(5);
                 // Remove the pickup from the game
                 Destroy(other.gameObject);
             }
             if (other.name == "AmmoPickup") { 
                 // Reward player with ammo
                 ModAmmo(3);
                 // Remove the pickup form the game
                 Destroy(other.gameObject);
             }
             
         }
         // wrecked into an enemy?
         else if (other.tag == "EnemyShip") {
             ModLives(-1);
             ModHealth(-1);
             ModShield(-25);
             
         }
     
     }
     
 }

   
 

Another issue I'm having is that the health does not update on the HUD when the player ship collides with the enemy but everything else from the HUD does. Never mind I fixed the problem with the HUD not updating the health