I was disconnected and I was missing a mounted turret after relogging.
Chararacter name is ZDS-Benjamin_Comptois
Mounted turret that went missing was a :
Cruiser Storm Cannon (Class 7)
Was trying out 2 tach+1 storm vs 2 storm+1 tach using the inventory window, not the equipment dealer, so I did not sell it by mistake.
Got no proof but logs maybe?