Calguns Foundation took in another victory with Silvester v. Harris which questioned contitutionality of a 10-day wait period for people who already have a registered firearm. California State has 180 days to comply and come up with a way to follow the ruling.
This doesn't mean all 10-day waiting period is over, but there shoudn't be any second waiting period after the initial purchase for certain group of buyers.
http://www.sfgate.com/news/article/Judge-strikes-down-California-s-10-day-wait-5711761.php
From: SFGate