From Multi Theft Auto: Wiki
This function removes a specified weapon or ammo from a certain player's inventory.
bool takeWeapon ( player thePlayer, int weaponId [, int ammo ] )
- thePlayer: A player object referencing the specified player.
- weaponId: An integer that refers to a weapon that you wish to remove.
- ammo: If used, this amount of ammo will be taken instead and the weapon will not be removed.
Returns a true if the weapon/ammo was removed successfully, false otherwise.
This example removes teargas from player.
addCommandHandler( 'rtear', function( thePlayer ) takeWeapon( thePlayer, 17 ) end )