After a bit of trial and a lot of error I managed to get a few mortars set up on an AO with varying results. I can get 4 tubes and 4 bipods in a Strider without removing any of the existing loadout just by using the available space already in the Strider by transferring a singly item one at a time from an Arsenal box. I am not sure yet if you can just load one bipod and the rest tubes into a vehicle and swap the bipod to a new tube when you run out of rounds. I am glad it worked in the end as it was a 10km trip to the AO. With a JTAC (Nuggs) marking targets and me sitting a "K" back from the AO we managed to do a bit of damage. I did find on a few shots that they dropped well short of the target but that's just like it is in real life. Mortar operators are called "Drop Short" in RL for a reason.