Firearms last a long time and the operator/owner can become quite connected to them, or one particular one, the favourite, and so letting them go can feel quite odd. I sold one of my long range rifles a little while back and I still miss owning it even though I didn't shoot it that much (the reason I sold it). I regret selling it and which it was back home where it belongs.

I certainly don't think a firearm is anywhere close to being as precious as my pets are to me but most firearms owners will think of their firearms as much valued items.