[Doubt] why only shoots rockets ?

[SoiiNoob]

Here's the wiki example , but changed to shotgun (25)

-- This function gets triggered everytime player shoots. 
function onClientPlayerWeaponFireFunc(weapon,ammo,ammoInClip,hitX,hitY,hitZ,hitElement) 
    if weapon == 38 then -- if source is a local player and he uses minigun... 
                x,y,z = getElementPosition(getLocalPlayer()) 
        if not createProjectile(getLocalPlayer(),19,x,y,z,200) then -- then we either create a projectile... 
            outputChatBox ( "Rocket minigun overheated! Give it a rest pal!", source ) -- or if projectile limit is reached we output player a chat message 
        end 
    end 
end 
  
-- Don't forget to add the onClientPlayerWeaponFireFunc function as a handler for onClientPlayerWeaponFire. 
addEventHandler("onClientPlayerWeaponFire", getLocalPlayer(), onClientPlayerWeaponFireFunc) 

I wanna make it to launch grenades (16) but it dont work, any help?

[Al3grab]

createProjectile(getLocalPlayer(),16,x,y,z,200)