Each modification has different upgrades. If you purchase M3 modification of an equipment, it will be a stock version and at zero upgrade steps.
100% satisfied, but I so mad that I have to wait until I buy m3 equipment to upgrade. that's means upgrading before is a waste of money.
I've been noticing lots of famous tankers waiting until m3 to upgrade their equipment. in addition someone told me u don't have to re-upgrade your equipment after u buy m3 as long as u upgraded at m2
Customer support service by UserEcho