I looked almost everywhere for a .22 rifle once. I even asked my neighbor and my brother if I gave it to them.
Two years later it turned up beween two studs in my gun room and I swore I looked there several times.
I hope your's shows up too sooner than mine did.
It will turn up eventually. Where and when is the question. I only paid $89 for it sixteen years ago. I tend to get upset when I find I am missing a gun. All my guns are accounted for other than that one gun but I am still looking.
But I have to ask, how did you let your gun get between two studs?