Originally Posted by Rastoff

It has to do with the California definition of an "assault" weapon.

In CA, assault weapons are illegal. CA defines an assault weapon as:
(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.

What the bullet button did was make it a fixed magazine. Because you had to use a tool (i.e. bullet tip) to remove the mag, it became fixed. Therefore, any semi auto that had the bullet button, was no longer an assault rifle and could have any of the features in the list.

This year they changed the definition of a fixed magazine to say that you have to disassemble the receiver to remove it. That mean that the current bullet button didn't make it a fixed mag any more.