One thought, it was mentioned this was a used Ultra Carry, as I remember from reading the info on the UCII when I got mine Kimber recommends changing the recoil springs at about 1200 rounds. That is the first thing I’d do if I bought a used Ultra Carry. Then at least you know you’re starting off when you should be from the standpoint of recoil springs.
Of course being a pessimist I’d also buy at least one new mag to try also.
My Ultra Carry has been pretty good but I’m still in a break in phase on that pistol, its got about 500 rounds through it.