Ethan,
When these and the 835 tactical came out they had a thumbhole type stock that wasn't made to be ambidextrious. At that time I called Mossberg and was told that they were not gonna make a lefty friendly stock for them. I've since lost interest in them and haven't been back to look at any of the newer ones.
Best thing to do(short of handling one and trying to move it) is to contact Mossberg and ask them this question.
Hopefully they ain't forgetting that some of us shoot from the proper side!
HAHAHA! okay, let the ripping begin.
HWD