Well, comprehension might be the issue.
You wrote: "...After 3 days without a denial, is the same as approval as far as the FFL is concerned..."
1. It isn't "3 days"
2. It isn't "the same as an approval"......that would be a proceed.
3. Approval of a transfer is not the same as not being prohibited from transferring. You don't think its a difference, but dealers, ATF, FBI and many states do.
Sigh.
See this is what I'm talking about....
1. "What if there is no response?" Again, the dealer may transfer the firearm on the MDI date given by the NICS examiner....not "after 3 days".
2. Your second sentence shows again you aren't as knowledgeable as you think.....there is no line 21d on a Form 4473.
It's Que. 19.d. (as I wrote above that you read)
Lets see:
You think it "3 days".....it isn't.
You think an "approval" means the same as a proceed...it doesn't.
You think there's a "line 21d" on the Form 4473.....again, fail.
A licensee can cancel a transfer for any reason that does not involve a violation of the buyers civil rights (race, ethnicity, age,etc).
If the buyer says "Imma gonna kill that man when I get home".....guess what? No gun for you.
Buyer tries to have someone else fill out the gun that has his name on the invoice? That's a straw sale. No gun for either of you.
Buyer reeks of weed or alcohol? No gun for you.
Buyer acts "weird", or makes comments threatening about a person or group.....No gun for you.
Your questions get dumber and dumberer. No, and nothing I've written in this thread or forum would lead someone of average intelligence to come to that conclusion.
Stop digging your hole.