Originally Posted by
D582
FWIW I've seen A319 safety cards say A319M so I'm not sure if the M means MAX in this case
The "M" in A319M stands for "Maritime". Those A319s came from the factory with emergency equipment like liferafts that add weight but also allow for operations over large bodies of water.
AC used to have a few of these types (FINs were in the high 250s - low 260s) but I am unsure of their current status.