Despite the win in Duncan v. Becerra, neither the District Court nor the 9th Circuit Court of Appeals has lifted the stay of the original ruling. Thus, despite what you might see from a number of dealers of standard capacity magazines, they still cannot be shipped to California at this time.
The Firearms Policy Coalition posted the notice from the California Department of Justice regarding this to Twitter.
In addition to warning both companies and California purchasers regarding the existing stay, it also serves to give notice that California will be appealing Judge Lee’s ruling and asking for an en banc hearing. However, as of this morning, no appeal had been filed.