Maryland passed a law effectively banning Glock pistol sales, and the NRA has already sued — bad news for gun owners in blue states, and a warning sign for Democrats trying to win independents.

• Governor Wes Moore signed a law banning semi-automatic pistols that can be easily converted to fire like machine guns using a "Glock switch."
• The NRA and two other gun groups sued the same day, arguing the law violates the Second Amendment.
• The strategy mirrors a product-flaw lawsuit that forced Kia and Hyundai to pay $145 million over cars that were too easy to steal — testing whether a "defect" angle can get guns banned where outright bans have failed.
• Democrats have long wanted a "definition bill" that lists banned guns and keeps adding models until nearly every gun is covered.
• The strictest gun-law states are all deep-blue: California, Illinois, Massachusetts, New York, New Jersey, Hawaii, and now Maryland.
• Moves like this push independents away from Democrats, the same way opposing voter ID does — most voters see both as common sense.

Outlook: The lawsuit will likely drag through federal court, and if Moore's test holds up, expect other blue states to copy the product-flaw approach to restrict more guns.