Here is an extensive legal analysis of California Assembly Bill 1127 (AB 1127), a recently enacted law that prohibits the future commercial sale of specific semi-automatic pistols, such as Glocks, categorized as "machinegun-convertible pistols" (MCPs). The analysis concludes that the law is unconstitutional because it bans arms "in common use" for self-defense and fails the historical test established by the Supreme Court case Bruen. The core argument for legal challenge is that AB 1127 targets a common firearm based on a technical internal component (the cruciform trigger bar) and its potential for modification by an already-illegal device (the pistol converter or "Glock switch"). The document recommends immediate litigation seeking an injunction before the July 1, 2026, effective date, arguing the law is a pretextual attempt to regulate legal commerce rather than addressing the actual criminal trafficking of conversion devices.