Probably yes: books about auto conversions were not mentioned. Not to mention that conversion could be done only by person knowing anything about machining or better - by professional gunsmith. Otherwise for example accidents with shooting whole magazine unwillingly or gun jams can happen.Or even some boom.
Also, let me guess...the 3 illegal machine guns (full-auto) were part of operation "Fast and Furious".
Probably yes: books about auto conversions were not mentioned. Not to mention that conversion could be done only by person knowing anything about machining or better - by professional gunsmith. Otherwise for example accidents with shooting whole magazine unwillingly or gun jams can happen.Or even some boom.