No person, other than a licensed dealer or one who has been issued a license to carry a pistol or revolver or an exempt person as hereinafter described, shall own or possess any firearm, rifle, shotgun or ammunition unless he has been issued a firearm identification card by the licensing authority pursuant to the provisions of section one hundred and twenty-nine B.
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The provisions of this section shall not apply to the following exempted persons and uses:
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(m) The temporary holding, handling or firing of a firearm for examination, trial or instruction in the presence of a holder of a license to carry firearms, or the temporary holding, handling or firing of a rifle or shotgun for examination, trial or instruction in the presence of a holder of a firearm identification card, or where such holding, handling or firing is for a lawful purpose;