Can you have flash suppressor on 22 rifle in CA?

There is no clear answer as it depends on the specific rifle and flash suppressor. Generally, rifles that are chambered in .22lr are not classified as “assault weapons” under California law, and therefore a flash suppressor would be legal to install on the rifle. However, if the rifle was later converted to fire a different caliber of ammunition (e.g. .223 Remington), then it would be considered an “assault weapon” under California law and the installation of a flash suppressor would be illegal. Always consult with local law enforcement or an attorney to confirm legality before making any modifications to your firearm.