BudsGunShop.com - Is this shotgun/any other weapon california legal

Frederick, this is not CA compliant. Pistol-grip firearms expelling a shotgun shell that are 26” or longer in overall length, but with
smooth-bore barrels shorter than 18” in length are not being transferred by California FFLs.
Regardless whether pump-action or semi-automatic, this category includes the Mossberg Shockwave, Remington Tac-14, Emperor Arms Duke / Mogul series, Charles Daly Honcho, RIA VRF14 and the like.
budsgunshop.com/feeds/state_reg/california_restrictions.pdf

The Remington TAC14 has a 14" smoothbore barrel length making it a firearm that is considered to be an unsafe handgun that is also an illegal SBS and illegal unconventional pistol under CA laws. In order to be CA legal, it must have a minimum 18" barrel length and a minimum 26" overall length.

Hi Frederick and welcome. Yes Sir it is being a Pump Action. Cheers and stay safe!