absolutley it;s California legal cause it's rimfire the assault weapon ban in CA specificaly addresses centerfire only. You can pistol grips, short barrels, folding stocks whatever you want on a rimfire.
12276.1 (a) Notwithstanding Penal Code section 12276, “assault weapon†shall also mean the following: Rifles
(1) A semiautomatic,
Centerfire rifle that has the capacity to accept a detachable magazine and any one of the following:
(A) A pistol grip that protrudes conspicuously beneath the action of the weapon.
(B) A thumbhole stock.
(C) A folding or telescoping stock.
(D) A grenade launcher or flare launcher.
(E) A flash suppressor.
(F) A forward pistol grip.
(2) A semiautomatic,
Centerfire rifle that has a fixed magazine with the capacity to accept more than 10 rounds.
(3) A semiautomatic,
Centerfire rifle that has an overall length of less than 30 inches.
oh and ofcourse a picture, I tihnk it looks pretty darn slick.