The Mega receivers are not on the list as of yet and are legal in CA correct?  I am wanting to bring mine there with me but wanted to check with you guys first.  

Also, am I correct in the belief that by replacing the mag release button with a lock washer and nut I am in compliance with California law?? (as long as it's a 10 rounder, I know..)  Thanks!

I'll be in the trenches with you guys soon!!

please read these faqs...

www.calguns.net/a_california_arak.htm

and


http://www.calguns.net/


but, presently you are correct... if you permanently affix a magazine no greater than 10 rounds...

IF and only IF the lowers are added to the list, you must then register them as AW...

As of today, Mega lowers are not banned by name (make/model).

If you are dealing with other than a bare receiver, your fixed 10rd mag should not be able to remove with out a bit of tools and time.   Hand-tight doesn't cut it.  A bit of ThreadLok (not the Red stuff!) or gluing the mag catch in could be helpful for compliance - but first really whale down on that castle nut and use a lockwasher.  This makes sure it can't be considered a detachable magazine (based on DOJ's definition in section 978.20 of Calif Code of Regulation)>

ALWAYS have an off-list lower with the 10rd mag affixed BEFORE you install a pistol grip, a telescoping or thumbhole stock, or an upper with a flash hider.  If you are servicing the magazine, REMOVE all these evil feature parts BEFORE working on/removing the magazine.

Bill W.
San Jose, CA

Thanks for the info gentlemen!