The 28-year-old man was previously convicted with attempted rape and served six months at Bomana.
Samson Dasi was arrested on Jan 11 and charged with being in possession of an offensive weapon, a charge under Section 12(1) of the Summary Offense Act.
He appeared before Magistrate Maristella Painap on Friday where he pleaded guilty to making the homemade gun himself. The gun was found on him at the market after police searched him.
