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

You are not limiting the ammo count in any way so of course it will go over whatever number

 // Modify the active ammo count by passed value
    public void ModAmmo(int _value) {
        CurAmmo += _value;
        
        // if you want to cap your ammo count, then... cap it
        if (CurAmmo > MaxAmmo)
            CurAmmo = MaxAmmo;


        // Update the new ammo value to the HUD
        PlayerHUD.updateAmmo(CurAmmo);
    }

As for your second question about health… i really cant answer because i have no idea what PlayerHUD.updateHp(CurHealth); does