Before I start, I'd like to say that I know this shouldn't be in this category, but I couldn't seem to find the "Content request" category.
I think it'd be awesome to have different variants of the MRAPs.
One of the things I loved about the A2 Humvees were the amount of different variants with different weapon sets. MRAPs with the traditional gunners seats (Like current day M2 Humvees) would be awesome too see in the game.
These could be fitted with a wide array of weapons that are already in the game like the M2 Browning, TOW launcher and even the M134 Minigun.
All that'd need to be done is a Model change and a few CFG changes. (I have never made a mod, only scripts so I'm sorry if i'm wrong here)
Also, I feel that in some missions, the RCWS is too OP as it makes it almost impossible to disable an MRAP by killing the gunner 'cause you need to make it through the bullet proof glass.
Example pictures:
http://www.peocscss.army.mil/Images/PM%20MRAP/matv-11.jpg
http://armystrongstories.com/blog-assets/chris-lecron/images/Mine_resistant_ambush_protected_ATV.jpg