In the mid to late 'eighties Games Designer Workshop released a role playing game based on a Third World War scenario. The forces on both sides started out equipped with current and bleeding edge (Ultra-Modern) military hardware.
Many of the designs were based on experimental vehicles and test beds, others on "to be delivered soon" equipment. As the present steamrollered over the "future" many of them fell by the wayside.
A revised version was released with a revised "future" after the fall of the Berlin Wall.
One of the vehicles was the M1A2 "Giraffe", a slightly futuristic design based on the current M1 tank.
One of the continuing thoughts on tank design is how to reduce the width of the turret to reduce weight but still provide protection to the crew. One way of doing that would be to move the crew into the hull and operate the turret and gun remotely. There were a number of designs before the M1 Tank Test Bed (including a Cromwell with a remote turret).
The Giraffe was based on this concept. History (in the form of the US Army) moved on and the M1A2 became an enhanced M1A1.
So I built a number of vehicles to represent Twilight 2000 vehicles. This is the Giraffe.
It was built more than 25 years ago, so I cannot remember the origin of the Abrams kit.
The hull was built according to the instructions. The turret ring was plated over leaving a hole to take the Meccano bearing.
Modelscenes Sewer Pipe was used to raise the turret above the hull..
Various items of stowage were added to the hull.
This model has been in storage for more than twenty years, only being brought out in response to a posting on a forum.
References for the M1 TTB (normal warnings about external internet sites apply)