Quote Originally Posted by Fuchs View Post
...unless you care about disadvantages, such as logistical problems and increased training requirements (less time for training as defensive infantryman).
The "logistical problems" are minimal- you have to manage a couple more types of ammunition that are already in the log train anyway. The 120mm is an addition to the Infantry BN, but was already present in the Cavalry, Mech and AR BNs. Not a big deal.

Additional training time is minimal- the fuzes, charges, fire control and crew procedures are all the same. The biggest difference is setting up the bipod/baseplate on the dismounted systems, which were already present when you had a dismountable 120mm mortar, like in the old M1064 mortar carriers.