80% lowers?

[*MALICE*]

Would a lower designed to only take a mag for a .22LR upper classify as an AR, requiring registration as restricted,

Yes.

or could it pass as an unrestricted firearm?

No.

Might one be able to produce lowers that would be non-restricted so long as it's coupled with a pump action upper, single shot, crossbow etc?

If an AR upper fits on it, then it's an AR lower.

 

[*MALICE*]

For anyone interested, make sure your FCG pocket looks similar to the one on the left, not like the one on the right

 

[Scharfschütze]

For anyone interested, make sure your FCG pocket looks similar to the one on the left, not like the one on the right

Why?? to easy to convert to full auto?

 

[8 ball]

What the pocket looks like makes no difference. If it has the hole drilled for the auto sear, then you are in trouble.

 

[*MALICE*]

Why?? to easy to convert to full auto?

I suppose that is what their 'logic' is.

What the pocket looks like makes no difference. If it has the hole drilled for the auto sear, then you are in trouble.

Incorrect. They specifically ask for pictures of the FCG pocket, and if it's cut in such a way that it can accept an auto-sear, even without the hole, your time with that lower may be short lived.

It doesn't have to look EXACTLY like the one on the left, but it can't accept an auto-sear (even if you haven't drilled the hole).

 

[8 ball]

I have never been asked for pics of the pocket before, maybe something new?

 

[*MALICE*]

I have never been asked for pics of the pocket before, maybe something new?

As of 2009 from the firearms techs

If you are machining or finishing a new receiver, we will need 3 photos of the inside of the trigger mechanism, 1 from the top, 1 from the top, angled slightly left, and 1 from the top angled slightly right.

The most important thing about the fire control pocket deals with the ability for it to contain an Auto Sear. If it is machined in such a way that it can, it then becomes classed as a full auto receiver even if the parts are not installed to make it FA capable

Mine were machined from solid blocks of aluminum, although I can't really see that making a difference. What photos did they ask you for?

With mine they didn't care what the outside looked like nor did they want a pic of the serial number.