When ordering any carrier, you need to make sure that you order a carrier that matches your ballistics manufacturer, since their carriers are made specifically to fit their own ballistic panels. Mixing and matching will void any warranties you may have and may cause adverse fit and protection coverage issues. The only exceptions to this are uniform companies that make outer vest carriers, but not ballistics.
Examples of this include:
5.11 Tactical's Class A and B Outer Vest Carriers
BAO Tactical's Outer Vest Carriers
Elbeco's line of External Vest Carriers
Be aware though that when these are used it is still required that you use them in tandem with your concealable carrier to hold your ballistic panels in order to not void the warranty.