We know of the 30 mm AP rounds on OFP and how they are a little more or a lot more effective against armor than High Explosive rounds and the sniper rifles that are big enough to destroy BMPs and such.
My idea is based on the WWII AP rifles. We have the Ap rifles right with their penatrating bullets and make weak armor units, (Bmps, M113s, Hmmv,brdm) have those actual bullets pass through armor and hit ppl inside and kill them and not just damage the vehicle unitl it crumples, explodes, or gives everyone red rashes.
For example you could specifically target the gunner of a BMP to take out the guns or knock off soldiers inside APCs. Be kinda cool since you don't have to destroy or seriously damage the tank/APC to get rid of it. Your mission bump off the drivers and gunners of the BMPs so our infantry can sourrond and destroy them.
Hard for scripting though.....