BudsGunShop.com - is tis ca legal?

Jimmy, yes Sir. This rimfire is good to go in CA. Cheers and stay safe!

Yes, this is California compliant/legal. 22s don't have the same strict laws like bigger center fire cartridges. Hope this helps.

Yes as a 22lr (rimfire) rifle it is CA legal budsgunshop.com/feeds/state_reg/california_restrictions.pdf

Also just looked on SWs website and they list it as CA compliant as well.
smith-wesson.com/product/mp-15-22

Yes, this is compliant in CA due to the fact that it is a rimfire (22lr) and rimfire rifles are not subject to the same restrictions as centerfire rifles.
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Copy and paste from buds CA compliance section.
"Permitted:
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✔ 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."
Full info here
budsgunshop.com/feeds/state_reg/california_restrictions.pdf