313 (2) It shall be unlawful for any person in the commonwealth to purchase or receive a 3-
314 dimensional printer or computer numerical control milling machine that has the primary or
315 intended function of manufacturing or assembling firearms, rifles, shotguns or completed or
316 unfinished frame or receivers, unless that person has a valid license to manufacture firearms;
317 provided however, that there shall be a presumption that a 3-dimensional printer or computer
318 numerical control milling machine has the primary or intended function of manufacturing or
319 assembling firearms, rifles, shotguns or completed or unfinished frame or receivers, if the printer
320 or machine is marketed or sold in a manner that: (i) advertises that it may be used to manufacture
321 or assemble firearms, rifles, shotguns or completed or unfinished frame or receivers; or(ii)
322 foreseeably promotes the printer or machine’s use in manufacturing or assembling such
323 weapons, regardless of whether the printer or machine is otherwise described or classified as
324 having other functions or as a general-purpose printer or machine.