Apparently putting a Magpul Angled Fore Grip on a Springfield SOCOM II in California makes the rifle into an "assault rifle" and requires a AR style bullet button to be in compliance. However replacing the AFG with a Magpul XTM Hand Stop is 100% legal and does not require a bullet button.
For example, this is not legal.
However this is legal, note the GG&G bipod is removed for storage.
For example, this is not legal.
However this is legal, note the GG&G bipod is removed for storage.