Reply #111: The M1 carbine is not classified by BATF as an automatic firearm and

[jody]

can be purchased as any other firearm. I don't remember any time where BATF classified them as automatic however if anyone has both an M1 carbine and the parts to convert it to an M2, then that combined possession qualifies as an automatic firearm.

You pose an interesting question and perhaps other participants in this forum can comment on your statement "But were semi's {e.g. M1 carbine} . . .Which used the same receiver as the selective-fire counterparts not reclassified as were the open bolt semi's?"