What if I buy/own a weapon that came with an M16 (style) BCG, is that a violation of NFA?

I'm not supposed to have M16 internal parts with an AR15 but even the new Colt 6940 (well pictured by an arfcomer on another thread) comes with that M16 style BCG...

maybe first in to say kicking a dead horse, you are good to go and it is not illegal.

Sorry, but didn't I read (on an NFA post) about the ATF saying, in a letter, that BCG's, triggers, selector pins, hammers from M16's would be considered 'Constructive Intent'???

It is well known that if you ONLY have the BCG you are good to go.

Q:  Will a BCG in itself make your rifle fire more than one round per single function of the trigger?
A: NOPE!

Yep, you'll be fine. The ATF told colt they were GTG shipping rifles with full auto bolts.

Q:  Did ATF state that M-16 bolt carriers and other fire control parts should NOT be used in the assembly of AR-15 semi-automatic rifles?
A:  Yes.

Q:  Did ATF state that M-16 bolt carriers are legal to use in AR15 semi-automatic rifles?
A:  Yes, as long as the addition of the M-16 bolt carrier does not cause the rifle to fire "automatically, more than one shot per trigger pull.

Q:  Did ATF tell Colt is was "okay" to use M-16 bolt carriers in AR-15 semi-automatic rifles?
A:  No, they told Colt that as long as the use of an M-16 bolt carrier did not cause their rifles to fire "automatically, more than one shot per trigger pull", it was okay to use the M-16 carrier.  

Q:  Will the use of an M-16 carrier in an AR-15 cause the rifle to fire automatically?
A:  Not by itself, however, using an established ATF test procedure the rifle will fire more than one shot per trigger pull when an M-16 carrier is used.  The only way this can happen is if a "shrouded" bolt carrier is used, as is the design of the M-16 carrier.  The rifle will not fire automatically in this ATF test if an AR-15 SP1 style carrier and hammer are used in the rifle.

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i allways thought that if you have a receiver with a hole in it for a sear then it's illegal because that's what makes the fun FA.  you can have all the other FA parts but with out the sear installed it won't do anything other than semi.  right?

So:

M16 style BCG = okay
Any and all M16 FCG parts = no way (or, one way...prison)?

I can possess M16 FCG's with a RDIAS in my lower or with my RDIAS out of a lower with only one 'matched' set of M16 FCG parts. If whenever those M16 FCG parts are in a rifle the DIAS is in there, as well.

Can't have two FCG's and one RDIAS.

Correct?

The M16 bolt carrier thread comes up almost as often as 870 vs 500 threads, why does the ATF have to be so conflicting in their letters, why can't all the examiners agree on their rulings?

Even for the government, this is bewildering...How can you keep track of it all?   arfcom is the answer: What's the question?