MO HB1730

Removes firearm silencers/suppressors from Missouri's list of prohibited weapons, effective August 28, 2026, and dismisses any pending criminal prosecutions for suppressor possession on that date

Declares that firearm suppressors manufactured entirely in Missouri from basic materials and remaining in the state are not subject to federal law or regulation under Congress's interstate commerce authority

Requires Missouri-made suppressors to be stamped with "Made in Missouri" and mandates the attorney general seek a federal court declaratory judgment on constitutionality when notified of a citizen's intent to manufacture one

Prohibits state and local government entities from enforcing federal firearm suppressor regulations that impose restrictions not existing under Missouri law

Authorizes citizens to file complaints with the attorney general against entities violating the federal enforcement prohibition, with penalties including denial of state grant funds and potential court action to compel compliance