Quick Legal Facts Statewide Preemption: No. Concealed Carry: Concealment is a factor under California law. Schools: California schools are weapons free zones. Major Cities with Knife Ordinances: Several. Critical Dimensions: Two inches or more—blade length of illegal switchblade under California law. Restricted Knives: Air Gauge Knife, Belt Buckle Knife, Lipstick Case Knife, Writing Pen Knife, Undetectable Knife, Shobi-zue (staff or rod containing knife blade), Cane Sword, Ballistic Knife, Switchblade Knife having a blade two inches or more in length, Undetectable Knife. **Definitions for these items are found in 16590 Generally prohibited weapon defined. California Penal Code 21310 which provides that […]