IL HB4471

Criminalizes the manufacture, sale, purchase, import, or transfer of "convertible pistols" — defined as semiautomatic pistols with cruciform trigger bars that can be readily converted to machine guns using common household tools and a "switch" device.

Classifies a convertible pistol equipped with a switch as a machine gun under Illinois law, subjecting it to existing machine gun prohibitions.

Establishes violation as a Class 2 felony with a sentence of 3-7 years imprisonment; possession of a loaded convertible pistol in a vehicle or on one's person elevates the offense to a Class X felony.

Defines "switch" as any device attached to a pistol's slide that enables rapid or automatic fire with one continuous trigger pull.

Excludes hammer-fired pistols and striker-fired pistols lacking cruciform trigger bars from the convertible pistol definition; polymer frame modifications do not prevent a pistol from being classified as convertible.