California Code, Penal Code - PEN § 12022

(a)(1) Except as provided in subdivisions (c) and (d), a person who is armed with a firearm in the commission of a felony or attempted felony shall be punished by an additional and consecutive term of imprisonment pursuant to subdivision (h) of Section 1170 for one year, unless the arming is an element of that offense. This additional term shall apply to a person who is a principal in the commission of a felony or attempted felony if one or more of the principals is armed with a firearm, whether or not the person is personally armed with a firearm.

(2) Except as provided in subdivision (c), and notwithstanding subdivision (d), if the firearm is an assault weapon, as defined in Section 30510 or 30515, or a machinegun, as defined in Section 16880, or a .50 BMG rifle, as defined in Section 30530, the additional and consecutive term described in this subdivision shall be three years imprisonment pursuant to subdivision (h) of Section 1170 whether or not the arming is an element of the offense of which the person was convicted. The additional term provided in this paragraph shall apply to any person who is a principal in the commission of a felony or attempted felony if one or more of the principals is armed with an assault weapon, machinegun, or a .50 BMG rifle, whether or not the person is personally armed with an assault weapon, machinegun, or a .50 BMG rifle.

(b)(1) A person who personally uses a deadly or dangerous weapon in the commission of a felony or attempted felony shall be punished by an additional and consecutive term of imprisonment in the state prison for one year, unless use of a deadly or dangerous weapon is an element of that offense.

(2) If the person described in paragraph (1) has been convicted of carjacking or attempted carjacking, the additional term shall be in the state prison for one, two, or three years.

(3) When a person is found to have personally used a deadly or dangerous weapon in the commission of a felony or attempted felony as provided in this subdivision and the weapon is owned by that person, the court shall order that the weapon be deemed a nuisance and disposed of in the manner provided in Sections 18000 and 18005.