Originally Posted by Magsz
The PC's are not compatible with cummerbunds unless you purchase the specific rear panel that will accommodate the cummerbund and that would have to be purchased second hand. I do not believe Eagle Industries will sell those pieces by themselves.
There IS an RLCS (ranger load carrying system) cummerbund that was designed to work with the Eagle RRV and the eagle standard plate carrier but its stupidly rare and very expensive.
The Eagle Plate Carrier, as in the non cummerbund version, is in fact compatible with a cummerbund. The PCw/CB has a different rear section that allows use of the removable cummerbund. This was not true of the original PC.
Eagle makes, and sometimes sells an item called the Cummerbund Retro Fit Kit for the Plate Carrier (non-cummerbund version). The kit consists of three parts; cummerbund, front and rear adaptors. You add the rear section to carry the CB and the front part is used to lock down the CB on the front.
As long as you need Khaki, I just happen to know where a guy could buy one. Use the Triad link below and drop the part number (PC-RK-MS-KH) into the search box. Otherwise you can find them listed at the end of the plate carrier/chest rig section of the site.