(a) A person is guilty of burglary in the third degree with a firearm when he commits burglary in the third degree as provided in section 53a-103 , and in the commission of such offense, he uses or is armed with and threatens the use of or displays or represents by his words or conduct that he possesses a pistol, revolver, shotgun, rifle, machine gun or other firearm. No person shall be convicted of burglary in the third degree and burglary in the third degree with a firearm upon the same transaction but such person may be charged and prosecuted for both such offenses upon the same information.
(b) Burglary in the third degree with a firearm is a class D felony for which one year of the sentence imposed shall not be suspended or reduced by the court.