The folks in the field may add their unofficial designation but for the record, there will only be one designation for the tanks whether they have the Barracuda or not.
These are: 2A4CAN - Plian vanila 2A4 with not much modifications done to them. used striclty for training.
The 2A4MCAN - all the operational bits and pieces whether they are installed or not. Ops is a throw back to the old designation before the Army came up with the official names for the tanks. If people are stillusing it, it is unofficial.
The 2A6MCAN - the dutch 2A6M but with all the Canadian stuff on it. No distinction whether all the bits and pieces are on or not.
The Army has now elected to field just about every piece of kit with minimal Ops Stock. The need to train the Army required that as much kit be fielded as possible. All my WLAV will be fielded and only a very small number will remain in Ops Stock storage in Montreal. That new building will be very lonely.