After July 2025, you will need a background check to buy magazines, barrels, any gun parts.... Gov Newscum signed this new law late last year. It is not the NCIC check but the wildly inaccurate state check used to buy ammo now, with a false positive of about 50% failure to pass. Just more punishment for gun owners. You have been warned. Buy your parts now. https://crpa.org/publications/firing-line/ca-firing-line-july-august-2020/ See the article on page 32, "The Severest Burden". "Starting on July 1, 2025, the dysfunctional ammo check system will be extended to all gun parts, thus preventing gun owners from replacing worn out barrels, triggers, etc....."