Henry, I sometimes find it odd and posted this the other day, but I think on another forum!
I believe you are right, and here is what I beleive.
1. They are afraid uncle sam will visit
2. They are afraid that it was stolen, or someone will say it was stolen
3. They are afraid someone will buy the gun, return it, minus a matching number (to a gun they have at home, making their mismatch, a match and this one now a mismatch...
Ed