BudsGunShop.com - California legal?

yes it is CA legal "All rimfire caliber rifles with a magazine capacity of 10 rounds or fewer (e.g.: .22LR, .17HMR, etc.)
are permitted, excluding rifles with tubular magazines in lever-action firearms, which do not have
magazine restrictions. Rimfire caliber rifles are not considered “assault weapons” and can have
features that centerfire rifles cannot." budsgunshop.com/feeds/state_reg/california_restrictions.pdf

Yes its good to go in CA, with that 10rd magazine capacity you'll want to get a few extra magazines in stock here
https://hkparts.net/product/10-round-magazine-hk416-colt-g36-22-lr-p1747.htm/

Yes, this is California compliant/legal. So you're good to go, enjoy and hope this helps.