Transferable/Registered M2 Carbine slide - mythical NFA weapon?

[RenegadeConservative]

I have to wonder if this might be a situation (similar to what happened in HK and AK land) where, although registered, the part cannot in fact be used on a firearm not registered as a MG because doing so would constitute the creation of a NEW MG.

This has been playing on my mind as well. The dealer has stated that the slide is brand new, has never been installed on a weapon, is registered and fully transferable, and is currently (I assume) on a Form 3 in Idaho. The price is right but until I know for sure that it is legit and can be installed on an non-Title II M1, I don't want it. No sense in having a paper machine gun.

Sometimes I think the whole M1/M2 Carbine situation is a huge gray area, kinda like the situation with the G series FAL and HK41/G3 in the 1960's.

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Thanks, Jeff. You da man!