400MP and DPS of 240MP+60ammo unit. Seems fair. If you change 60 ammo for MP according to 5:2:1(or something like that) income, you will get quite similar price.
In other words, I find they price jusified, just like T4 requirement.
PS
The same way we could say that Paras or Rangers are only useful with Thompsons/LMGs.
Doesn't Paras got a higher dps in ranges shorter than 19 and 2 more man? Sure obers got a better accuration modifer and dps but they are more expensive.
These units are currently only efficence when they have there mg. I think there cost efficence without a upgrade need to be buffed, and a small mg damdge nerf. So that they get better stock without making them to powerfull upragded. Because currently they don't perform good for there cost.