Gadsden Dynamics gave us a sneak peek of a shotgun specific version of their Wasp Rig that will be available in the near future. The new rig features the same admin/IFAK pouch found on all Wasp Rigs. It also features a single pistol magazine pouch and 12 elastic loops that can be used to carry 12 gauge shotgun shells.
You can check out current Wasp Rig variations at Gadsden Dynamics. Stay tuned for more details on the shotgun version.