California Compliance - Bullet Button for AR Rifles
The Bullet Button is used to permanently fix your AR's magazine in order to comply with California's idiotic and totally non-2A infringing assault weapons ban.
This easy to install device recesses a small release within a block that replaces the magazine release. The recessed button to detach the magazine cannot be pressed by the shooter's finger. Firearms with this feature no longer have a "detachable magazine" under California's assault weapons definition, and therefore may be exempt depending on the other requirements.
The 2012 court case Haynie v Pleasanton validated that a bullet button is legal and rifles that have one installed are not considered assault weapons under California law.