As of July 01, 2018, Registration in California is no longer an option! If you have a semi-automatic center-fire rifle with a detachable magazine in California, you will want to make sure it is featureless.
A featureless rifle is a semi-automatic center-fire rifle having a detachable magazine, but does not have any of the following:
A pistol grip protruding below the action
A flash suppressor
A collapsible stock
A folding stock
A forward pistol grip
The FN SCAR 16S below is an example of a featureless rifle that is legal in California.
Some of the methods used to meet the requirements of a featureless rifle in California are:
A Kydex grip-wrap can be added to prevent the thumb from wrapping around the pistol grip.
A muzzle brake designed to reduce recoil and muzzle jump can replace a flash suppressor.
The stock can be mechanically fixed so it cannot fold or collapse by hand.
12276.1 (a) Notwithstanding PC section 12276, assault weapon shall also mean the following: Rifles (1) A semiautomatic, centerfire rifle that has the capacity to accept a detachable magazine CCR 11 § 5469 (a) and any one of the following: (A) A pistol grip CCR 11 § 5469 (d) (B) A thumbhole stock. CCR 11 § 5469 (e) (C) A folding or telescoping stock. (D) A grenade launcher or flare launcher. (E) A flash suppressor. CCR 11 § 5469 (b) (F) A forward pistol grip. CCR 11 § 5469 (c) (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