Cal. Pen. Code § 245.3
Every person who commits an assault with a deadly weapon or instrument or by any means likely to produce great bodily injury upon the person of a custodial officer as defined in Section 831 or 831.5, and who knows or reasonably should know that the victim is a custodial officer engaged in the performance of that person's duties, shall be punished by imprisonment in the state prison for three, four, or five years.
When a person is convicted of a violation of this section in a case involving use of a deadly weapon or instrument, and such weapon or instrument is owned by that person, the court may, in its discretion, order that the weapon or instrument be deemed a nuisance and shall be confiscated and destroyed in the manner provided by Sections 18000 and 18005.
Ca. Pen. Code § 245.3