We are still allowed detachable magazine weapons here in CA, I have several. The definition of an "assault weapon" in the State of California is as follows (from CA DoJ):
Generic Characteristics Defining Assault Weapons:
12276.1 (a) Notwithstanding Penal Code section 12276, “assault weapon” shall also mean the following:
(1) A semiautomatic, centerfire rifle that has the capacity to accept a detachable magazine and any one of(3) A semiautomatic, centerfire rifle that has an overall length of less than 30 inches.
(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
this is in addition to the Roberti Roos act of 1989