Bullet button

The name came about in relation to a 1999 California law which said that a "bullet or ammunition cartridge is considered a tool.

"[1] 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.

After certain rifles with detachable magazines and certain other features were classified as assault weapons under California State law, gun owners and manufacturers sought various ways to obtain certain styles of rifles similar to those determined to be assault weapons.

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.

[5][6] On April 20, 2016, California state lawmakers gave initial approval of a bill that prohibited the sale of rifles with the bullet button.