I wouldn't say anything unless the firearm would become visible while I was retrieving my licenses, registration, or insurance. I've heard of 1 or 2 people talking about handing over their permit with their drivers license and the cop went kinda nuts. I guess it depends on the officer and how...
That's just for a transfer of ownership. When you ship a gun back to a manufacture for warranty work, such as Taurus. They send it right back to you.
Not being an FFL just limits the shipping providers you can legally use.
I have a .40 Kel Tec sub-2000 with 1) 15 round Glock 22 mag. I've put about 100 rounds of Winchester white box FMJ through it. I bought it around April of this year, not really trying to get rid of it, but would take $350 for it. I know that's a lot, but it's more valuable to me keeping it...
I have a 23c and like it quite a bit over others. The middle sized glock feels the best in my hand and I really can't tell any difference in recoil from my compensated .40 over an uncompensated 9mm.