The suspects are: Philip John, owner of the factory, Onyegabueze Okpara, supplier of ammunitions and Joseph Bulus, distributor of the arms.
Mr. Bello made the disclosure while briefing journalists on arrest by operatives of the command on Friday in Abuja.
He said that items recovered from the suspects include: locally fabricated revolver pistol cylinder, four Dane guns, one double barrel gun, one single barrel gun, two calibre live cartridge and six Dane gun muzzles.
Others are: four single barrel muzzles, six barrel gun frame, two gun muzzle spring, one manual motor drill, one dice for retread and various implements used for manufacturing locally made weapons.
He said that during interrogation, Mr. John confessed to have been in the illicit business for 17 years and selling the fabricated single-barrel guns and Dane gun for N20,000 and N10,000 respectively.
The commissioner said that Mr. Okpara, who