In a move that directly burdens Maryland gun owners' ability to purchase popular self-defense handguns, Governor Wes Moore signed SB 334 into law on May 26, 2026, prohibiting the manufacture, sale, purchase, or transfer of 'machine gun convertible pistols' starting January 1, 2027. The law specifically targets semiautomatic pistols with a cruciform trigger bar—characteristic of Glock and similar models—that can be readily converted using illegal 'Glock switches' or auto sears, which replace the slide backplate. Exemptions exist for active and retired law enforcement, immediate family transfers, inheritances, and limited gunsmithing, but the core policy shifts focus from criminals to the firearms themselves.

Supporters, including Everytown for Gun Safety and Moms Demand Action, frame it as essential public safety legislation. They cite ATF data showing an 784% national surge in recovered conversion devices from 2019-2023, doubled Glock switch recoveries in Baltimore in 2024, and incidents including a mass shooting at Morgan State University. Baltimore officials and state Attorney General Anthony Brown have long pursued litigation against Glock over easy convertibility. The law is positioned as holding manufacturers accountable by setting a 'basic safety standard' for pistols sold in the state.

However, gun rights organizations argue this concrete policy exemplifies punishing the law-abiding for the crimes of others. Glock switches have been illegal under federal and Maryland law for years, yet enforcement appears insufficient amid rising street crime. The National Rifle Association, Firearms Policy Coalition, and Second Amendment Foundation filed federal lawsuits the same day the bill was signed, asserting the ban violates the Second Amendment. They contend it targets firearms 'in common use' protected under District of Columbia v. Heller (2008) and fails Bruen's (2022) history-and-tradition test for modern regulations, as there is no historical analogue for banning an entire class of ordinary handguns due to potential illegal modification.

Missed connections include how this law fragments the national firearms market, potentially forcing manufacturers to redesign triggers or exit the state, while highlighting selective enforcement: police recover converted Glocks from criminals, but legislators avoid harder prosecution or border controls on illegal parts. Maryland House Republicans and groups like Maryland Shall Issue had urged a veto, warning it bans the state's most popular handgun platform. As the second state to enact such a measure, it signals a broader post-Bruen strategy by gun control advocates to test limits on 'features-based' bans. Courts will now decide if Maryland can constitutionally leap from illegal accessories to restricting citizens' core self-defense rights. The immediate legal challenges underscore deep anger, framing the debate as one of constitutional fidelity versus emotional appeals to 'do something' about crime.