I am under the impression from seeing the system last year at Trexpo that the recoil kits are third-party items that Virtra buys? Fats makes thier own recoil weapons (wireless/tetherless recoil "bluefire"), and AIS makes their own recoil weapons. I think that IES and Lasershot are using the same recoil kits from the same manufacturer that Virtra is buying them from.