The Roland Special

You'll need a system that doesn't require a threaded barrel. Luckily, several manufacturers have already prepared for the prospect of CA gun owners wanting comped guns and have prepared a selection of options;

https://www.mayhem-syndicate.com/sh...m-wbarrel-for-g191726-pre-order-black-nitride

https://www.strikeindustries.com/shop/products/glocktm/si-g4-scomp.html

https://www.weaponsarmamentresearch.com/products/war-l-o-c-lock-on-compensator

They all have different features and attachment methods, so you'll need to do some research and determine which you like best.

Another feasible option would be to send your slide off to an out-of-state gunsmith and have them install a more traditional threaded barrel and comp combo, then pin and weld the comp to the barrel to make it a permanent fixture. That will likely be the costliest option, but if none of the above products appeal to you it would be the way to go
Maybe I misunderstood the CA. law on this but I thought a threaded barrel on a pistol there was a flat out no-go (it classifies a pistol as an assault weapon). Did I misunderstand? I hope so, I do have CA. alternatives to my comped 19, but that would be my first choice to take with me if legally able to do so.
 
Maybe I misunderstood the CA. law on this but I thought a threaded barrel on a pistol there was a flat out no-go (it classifies a pistol as an assault weapon). Did I misunderstand? I hope so, I do have CA. alternatives to my comped 19, but that would be my first choice to take with me if legally able to do so.
CA laws are so convoluted and ever-changing that it can be difficult to nail down what the present definitions are. To my understanding, any semi-auto firearm (rifle, pistol, shotgun, etc) with a detachable magazine need only have one of the "assault weapon" traits to be considerred illegal. If your compensator is not permanently affixed to your threaded barrel, that's a qualifying banned feature according to CA statute. And red loctite doesn't count as permanently affixed - it has to be pinned and welded (like 14.5" rifle barrels in normal states).

The reason the three products I listed above are legal to possess in CA is because they don't rely on threading of the barrel to be affixed, therefore the barrels aren't capable of accepting a flash suppressor, sound suppressor, or "barrel-mounted forward handgrip", whatever the hell that means.

STANDARD STATUTE INTERPRETATION DISCLAIMER: I'm not a lawyer, the above should not be considered legal advice. For specifics and certainty you should consult an attorney familiar with California's gun laws specifically