Daniel Defense DDM4 V7 Mod Rail 5.56mm NATO 16in Black Semi Automatic Rifle - 10+1 Rounds - This Daniel Defense DDM4 V7 Rifle is California Compliant and features a low profile gas block. 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 Matte Black Finish California Compliant Low Profile Gas Block