I was going to post .Tromas's Arm Suit MOC a few days ago, but I'm glad I waited until now, because the builder also made this sweet truck to go along with the mech:
The description from Flickr reads:
Mastodons formed the backbone of mine protected vehicles in both the Canadian and Japanese armed forces for the last two decades. With the formation of Canada-Japan and the merging of the armed forces there was a surplus of Mastodons. With the primary goal of the forces now being national self defence and peacekeeping many surplus Mastodons have been retrofitted to carriers for the newly developed Arm Suits. The high mobility chassis is ideal for operations throughout Neo-Canada and although it is somewhat overkill in urban environs, it is perfectly at home patrolling the tundras of the far north.
More images here