Ephrael, on 15 April 2014 - 12:39 AM, said:
The VTR-9s(c) have the same range of motion of the arms as the VTR-DS so i do not know why the extra slot is used.
In regards to the arm movement, if you have arm to torso lock disengaged (its engaged by default), the DS has a wider arm motion, where as the 9s is stuck to the torso for lateral movement and only gains vertical difference.
The extra critical slot allows for further extension laterally with arm weapons when not using armlock.
But as been stated, contact customer support and they'll work with you.