Emerson Gear FCS Style Vest W/MK Chest RigEmerson Gear FCS Style Vest W MK Chest Rig The Emerson Gear FCS style vest is a fantastic and lightweight design that allows you to carry the essential combat gear out on the field. This vest has so many features, so we'll start with the most dynamic part. The front of the vest has the quick detach section held on with buckles and velcro on the front panel which is most like the Emerson Gear Micro Fight chest rigs, they can be removed and changed