Totally ridiculous click bait. And you just helped the site out by posting the link.
" . . . the Missouri Department of Tobacco and Firearms . . . " Yeah, right. There's no such thing.
Try this:
Chapter 571 of Missouri Revised Statutes, weapons offenses 571.020. Possession--manufacture--transport--repair--sale of certain weapons a crime--exceptions--penalties. — 1. A person commits an offense if such person knowingly possesses, manufactures, transports, repairs, or sells:
(1) An explosive weapon;
(2) An explosive, incendiary or poison substance or material with the purpose to possess, manufacture or sell an explosive weapon;
(3) A gas gun;
(4) A bullet or projectile which explodes or detonates upon impact because of an independent explosive charge after having been shot from a firearm; or
(5) Knuckles; or
(6) Any of the following in violation of federal law:.
(THIS PART IS IMPORTANT -- NFA stuff is legal under federal law if you pay your tax. Possession of machine guns, short-barreled weapons and silencers is legal in Missouri so long as you're legal under federal law. The only federal law about switchblades has to do with mailing them or carrying them in federal facilities -- Switchblades are only illegal in MIssouri if you violate federal law by mailing them or carrying them into a federal facility.) (a) A machine gun;
(b) A short-barreled rifle or shotgun;
(c) A firearm silencer; or
(d) A switchblade knife.