Massachusetts General Laws Part IV. Crimes, Punishments and Proceedings in Criminal Cases (Ch. 263-280) Ch. 265, § 18A

Whoever, being armed with a dangerous weapon, enters a dwelling house and while therein assaults another with intent to commit a felony shall be punished by imprisonment in the state prison for life, or for a term of not less than ten years. No person imprisoned under this paragraph shall be eligible for parole in less than five years.

Whoever, being armed with a dangerous weapon defined as a firearm, shotgun, rifle or assault weapon, enters a dwelling house and while therein assaults another with intent to commit a felony shall be punished by imprisonment in the state prison for a term of not less than ten years. Such person shall not be eligible for parole prior to the expiration of ten years.