Don't change gun when i click 1 or 2

Hello i am making a game that when i click 1 it shoes a gun and when i click 2 it shows another but i don’t know why it only changes if i stop the game and enter again.

this is the code

    public void Update()
        if (Input.GetKeyDown("1"))
        if (Input.GetKeyDown("2"))

i think this should work. the problem why it is not switching must be somewhere else.


at the start of this script does it say?

public GameObject deagle;
public GameObject m4a1;

and you properly added the corresponding gameobjects into the inspector slots?