The CMMG Drop In .22 LR AR15 Conversion Kit will give you all the features you want your rifle to have in California with none of the jail time. Not to mention, shooting for 3 cents a round.
CMMG, AR15 Ambi Mag Catch, Black
Compatible with all AR15/M16 rifles
Installs the same as factory mag catch
Includes mag release button and spring
Made in the USA