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MACHINE GUN, POSSESSION
166.272 Unlawful possession of machine guns, certain short-barreled firearms and firearms silencers. (1) A person commits the crime of unlawful possession of a machine gun, short-barreled rifle, short-barreled shotgun or firearms silencer if the person knowingly possesses any machine gun, short-barreled rifle, short-barreled shotgun or firearms silencer.
(2) Unlawful possession of a machine gun, short-barreled rifle, short-barreled shotgun or firearms silencer is a Class B felony.
(3) A peace officer may not arrest or charge a person for violating subsection (1) of this section if the person has in the person’s immediate possession documentation showing that the machine gun, short-barreled rifle, short-barreled shotgun or firearms silencer is registered as required under federal law.
(4) It is an affirmative defense to a charge of violating subsection (1) of this section that the machine gun, short-barreled rifle, short-barreled shotgun or firearms silencer was registered as required under federal law.