Kel-Tec SU-16CA Carbine 5.56mm NATO 16in Black Semi Automatic Rifle - 10+1 Rounds - California Compliant - The SU-16CA is a hybrid of the SU-16C and SU-16A rifles. It comes with the same 16-inch barrel with chrome-lined bore and chamber and 1/2-28 threads as the C model. All features from the C model are retained and combined with the stock of the A model. California compliant design prevents the magazine release button from being engaged while fully assembled, locking the magazine into the receiver. To release the magazine from the rifle, the shooter will be required separate the upper from the lower by pulling on an extended (rear) takedown pin with an attached cord to make the process easier. Once the magazine has been released the rifle can be re-assembled and shot once again.