4/4/2014 4:06:28 PM PermalinkTo support your theory, look at the Duke MK. 44, on the drawing board. You can see the customization there as you described. The red version is the same as the silver version, without the slide attachment on the bottom of the receiver. The trading card is the silver version with the red skin and the attachment added, one weapon in customizable versions. The version with the added sights and receiver attachment and decals is an example of the this customizable ability.
Pardon our dust! Patch 1.0.2 goes live today. You will need to log in again after returning to the title screen, but will not be kicked from activities. The patch goes live at 10:00 AM PDT.