The Flex Tactical is backwards-compatible with our standard Flex modules, with some exceptions (due to the latch system changes). Regular Flex modules can attach to the bottom of your Flex Tactical system and latch together, but Tactical modules cannot latch to regular Flex modules. They'll work together, but you won't be able to transport them together as a single unit like this. For instance, you can attach regular Flex batteries to the bottom of a Flex Tactical system and they'll latch together, but you cannot latch a regular Flex power console to Flex Tactical batteries, preventing carrying/transportation. However, the Flex Tactical features are unique to the Tactical modules, so using regular Flex modules may affect/disable some features of the Tactical system (such as IP52 dust/water protection).