My hardest used shotgun still functioning is a Kahn Arthemis 20ga w/28" barrels. More than 10,000 rounds through it. Breech face is starting to erode from shooting "hotter" 20ga Herter's cartridges. Not bad for $349.00.
Shot a straight with the F/M chokes today AAMOF.

I've worn out several autoloaders due to volume heavy duck loads, and broken inumerable SxS's.

Tamid, are you sure your Citori isn't a Citori Superlight?(I don't think Lightning's ever had anything other than a round knob semi-pistol, and a rounded forend)They are good for about 40k rounds before rejointing. That's a stout design.

Out there doing it best I can.