Here are a couple of M113s. they both look like they might be some type of Mtce vehicles with the large stowage boxes but I can not say. The supporting racks for the boxes are different for each vehicle. The first is lengthened, has the grizzly turret, double side opening cargo hatch, and Diehl track. The second is not lengthened, has a RWS, rear opening cargo hatch,and new track Note the extended AMUs on both vehicles and the extended fuel filler pipes on the second one. Can anyone the rational behind some vehicles being lengthened but with original track while other vehicles with new track and RWS were not lengthened? OR why some vehicles got Grizzly turrets and why others got RWS? There seem to be a lot of nearly one off variants around? Would the boxes and various extended pieces of equipment be unit installed modifications? I have more of each as well as some of a 577 if anybody is interested but do not have enough space to post them just yet.
I believe the top one is what the guys in Gagetown called a Fitters vehicle, the Mechs ride. Early 2000's there was a plan rebuild many of the 113 family and stretch them as you see.
The reason that they have the old track is because the new track type doesn't like the extra road wheel or so I am told.
Hopefully someone with much better knowledge can fill us in.