It would appear that the only viable reload would be another cylinder already filled up. But now you gotta find a place to store it, and I wonder whether or not shells are captured in any way or if you grab your spare cylinder the wrong way, do all the shells spill out? Regardless, it's a lot of space taken up on the gear fo six shells. Popping the cylinder off, dumping empties, reloading, then putting it back on seems like it would take a ton of time. Giant sized moon clips?
I would also hope that the cylinder is oriented and designed in such a way were it is hard to mess that up... or I could see being similar to a revolver and have a captured cylinder. Moon clips seem like the only quick way to work it if thats the case.
I really like the idea of the integrally suppressed model they have. If the OAL is comparable to other bullpups, it could make an excellent house gun. Of course, this shotgun has a lot of other missions in mind, but they are out of my wheelhouse.
The M32 is already in service. And it works decently if you only have to shoot six rounds. As mentioned before the reload process is slow. If you are shooting 12 rounds a 320 will be faster. I still prefer a stripped down 320 because of the flexibility to easily swap between different 40mm rounds. If you need a parachute flare but your whole cylinder is HEDP you are in a bad spot. This would be the same for the SIX12.