From our supplier:

AR MAGLOCK is a patented AR-15 fixed magazine solution that allows California, New York and Connecticut AR-15 owners to avoid assault weapon registration within their respective state by staying compliant with the laws.

The California Legislature recently passed laws mandating registration of all assault weapons. SB 880 and AB 1135 will require that all assault weapons owners register their firearms with the CA DOJ, to include AR-15 firearms with magazine locking devices requiring a tool or bullet to remove the magazine. The registration shall contain a description of the firearm that identifies it uniquely, including all identification marks, the full name, address, date of birth, and thumbprint of the owner, and any other information that the department may deem appropriate.

SB 880 and AB 1135 amends the definition of an assault weapon to refer to a rifle that has one of several specified military-style features and “does not have a fixed magazine,” rather than a gun with one of those features and the “capacity to accept a detachable magazine. Continued legal possession requires that you REGISTER and pay a FEE (TAX) on ALL your semi-autos newly classified as “assault weapons.”

These new laws apply to rifles that do not have a fixed magazine. The laws define “fixed magazine” as an ammunition feeding device contained in, or permanently attached to, a firearm in such a manner that the device cannot be removed without disassembly of the firearm action. This wording essentially renders other magazine locking devices useless. AR-15 owners now have to disassemble their firearm action in order to release the magazine.

Just to be sure there is no confusion, these new laws state (b) (1) Any person who, from January 1, 2001, to December 31, 2016, inclusive, lawfully possessed an assault weapon that does not have a fixed magazine, as defined in Section 30515, including those weapons with an ammunition feeding device that can be removed readily from the firearm with the use of a tool, shall register the firearm before January 1, 2018. See here for exact wording of the new laws:  SB 880 and AB 1135

The AR MAGLOCK turns your firearm into a “fixed magazine” firearm that cannot release the magazine unless you pull the takedown pin, and separate the upper and lower receivers, thus “disassembling” the firearm action. Once the receivers are minimally separated, the ARMagLock can be engaged to release the magazine.