There are a few different models of this rifle out there, some are legal in CA some are not.
This one was designed specifically to be legal in CA
https://wbtguns.com/semi-auto-rifles/fightlite-scr-moe-carbine-california-legal-223-5-56/
Details here
budsgunshop.com/feeds/state_reg/california_restrictions.pdf

Douglas, the Flightlite SCR is 100% legal in CA. It does not have a pistol grip, thumbhole stock, folding stock, grenade launcher, flash hider, or foregrip, and it is less than 10 rounds. budsgunshop.com/feeds/state_reg/california_restrictions.pdf

YES, SCR is 50 states legal including CA. Check laws here ( budsgunshop.com/feeds/state_reg/california_restrictions.pdf ) I hope this helps!

Douglas, yes Sir it is. Cheers and stay safe! The SCR is 50 state legal. For Californians it is classified as a featureless rifle so you can still have a removable magazine and not need to register the gun.