ReliefGuard posted... 4 Police wanted level Light armored tank with Machine gun mounted on top (this is not TANK *M1A1 Arbams*)
This is the Bear, making an encore appearance. One way to get the Guard variant is to answer the survival call that spawns a bit north of your starting safehouse (it's the one where a random Saint complains about police interference) and get yourself taken down when the army shows up. You respawn, with zero heat, close enough that if you head back over there quickly you might see a blockade or two consisting of two Bears, some infantry, and a Challenger. The Bears may be taken without incident (provided you don't run into anyone); the Challenger has to be relieved of its turret gunner first (just like in Mercenaries).
There is a military base on an island on the south eastern part of the map it's tied between the middle and far right island...
The unique Eagle Darkknight123 mentions also has, in addition to the distinct color scheme and ESSS (External Stores Support System) pylons, different engine housings.
White Knight of the Order of Mihoshi Enthusiasts "Destroyed overnight, or the next one's free."