ART. 10. That from and after the passage of this act it shall be unlawful to fire any pistol, rifle, shot gun, or other kind of firearms, within the limits of the town of Millican, and any person violating this act shall be fined not less than five nor more then twenty-five dollars to be collected by the mayor of the town; but this act shall not prevent any gunsmith within the limits of the town from discharging on the premises thereof firearms made or repaired in his shop, for the purpose of’ training such firearms; provided, that none but gunsmiths shall have the privilege of being authorized to discharge firearms, and for that purpose each gunsmith shall build a rock wall, in front of which lie shall cause a target to be placed. The mayor shall issue a permit to any gunsmith applying for the same for the period of one year, which permit may be renewed after its expiration.