MO HB594

Moves machine guns, short-barreled rifles or shotguns, and firearm silencers from general state prohibitions to violations only when they breach federal law.

Creates a new category of federal law violations for machine guns, short-barreled rifles or shotguns, and firearm silencers with criminal penalties.

Maintains class C felony penalties for explosives, explosive substances, gas guns, and related offenses.

Maintains class A misdemeanor penalties for switchblade knives, explosive projectiles, and knuckles.

Preserves existing exemptions for lawful possession by military, law enforcement, licensed dealers, antique firearms, and items used in lawful commercial or dramatic purposes.