reasonable comparisons
Everyone here should, and at least I would, cheerfully aid in solving any murder that law enforcement felt I could help in. But again, there are limits, bound by my civil rights.
That is, I would let them look over my car, measure the tires, whatever. And I have no problem letting the gov't know I own a car, as my right to own specifically an automobile is NOT protected in the Constitution.
But I would not let them confiscate my property without a specific warrant.
I would also allow them to see my shoes, take a plaster cast, whatever (long as they cleaned them up). Again, the right to own footwear is NOT protected in the constitution. Allowing them to record my ownership of shoes is no problem to me. They still can't have them without a specific warrant.
Would I let them see a makarov barrel? or the whole pistol? or any gun? or one single fired brass casing?
On the surface, these are completely analogous and comparable to the above cars and shoes.
But (and you saw it coming)...
the right to own firearms IS protected by the constitution, and for the very reason of preventing unreasonable search and seizures- among other things; and registration preceeds confiscation.
We all know it.
So does our government.
Anyone who doesn't say so is either misguided (and thus shouldn't be in office) or is lying and is about to do something that would normally result in those firearms being pointed in their direction.
Allowing the FBI or anyone else to record your possession of that firearm is de facto registration. Your name is on the list, buddy. Nice going.
Back to the questions.
As for myself, I would take the more complicated approach and cooperate but negotiate the terms of the barrels return with a lawyer and contract, in front of witnesses in a public place. That goes for parts only. The receiver would be brought to the nearest FFL and recorded in his book as a transfer and the same contract and lawyer business would be followed.
Annoying to both parties, but I actually CARE about my rights. They have been sold out and eroded enough already.
As long as my rights are respected, I will fully cooperate with law enforcement. THAT is my duty as an American!
C-