Disable Weapons Until Bought FPS Creator Kit

Hey there everyone. So I'm using the FPS Creator Kit and I'm trying to make a system in which you have to buy the guns with points in order to use them. The only issue is that I'm not too sure how to disable the other weapons until you buy them. As of right now, I have 4 different types of weapons which can be used by pressing the 1,2,3,4 keys. Is there some way to disable guns that I have yet to buy? Below is the part of the script that I'm having trouble.

     for (int i = 0; i < startingWeapons.Length; ++i)
     {
         PickupWeapon(startingWeapons[i]);
     }

     for (int i = 0; i < startingAmmo.Length; ++i)
     {
         ChangeAmmo(startingAmmo[i].ammoType, startingAmmo[i].amount);
     }
     
     m_CurrentWeapon = -1;
     ChangeWeapon(0);

     for (int i = 0; i < startingAmmo.Length; ++i)
     {
         m_AmmoInventory[startingAmmo[i].ammoType] = startingAmmo[i].amount;
     }

I just need help disabling weapons when I don't have them and enabling them when I buy them. Any and all help is appreciated. Thank you!