Mass. Gen. Laws ch. 140, § 131N (2026)

Section 131N. No person shall knowingly possess, own, sell, offer for sale, transfer, manufacture, assemble, repair or import any firearm capable of discharging a bullet or shot that is a covert firearm or an undetectable firearm all as defined in section 121. Whoever violates the provisions of this section shall be punished, for a first offense, by a fine of not less than $1,000 nor more than $10,000 or by imprisonment for not less than one year nor more than ten years, or by both such fine and imprisonment, and for a second offense, by a fine of not less than $5,000 nor more than $15,000 or by imprisonment for not less than five years nor more than 15 years, or by both such fine and imprisonment.