What, OP, you don't know what Kentucky Jelly is?
Not being clear if you already owned the Revolution 9 yet, or any of the potential hosts you mentioned, my point was to give you information to make an informed decision, host(s) or can.
As Green0 reinforced, threading the normal Griffin 1/2 X 28 booster piston onto a threaded Sig P938 (or Glock 43) is risky because their is no square shoulder for the can to torque up coaxial with the barrel. Threads alone can cock the can off the bore line leading to front cap or baffle strikes. Fortunately, SilencerCo pistons are compatible with Griffin and their SiCo 1/2 X 28 SN piston has an internal shoulder and short threads so it will index properly on a square muzzle crown; it's marketed for G43 and P938 use.
The latest Rev-9's tubes are turned from 7075-T6 high strength aluminum and can handle limited centerfire rifle use as long as the can doesn't get too hot. I think their modular design is less handy than that of the Tirant 9m or the Rugged Obsidians, or Gemtech Lunar. Those designs put the removable short section at the front cap end, which is cleaner than the blast chamber end. To shorten those the front cap and short section are removed, and the front cap replaced on the main body. Griffin requires the booster housing be moved as well, as it resides in the removable short section when in long mode.
The reason we did this is to be able to configure the back end of the suppressor which makes our Rev series more versatile than the competition. Case in point you can interface the Taper Mount Minimalist Blast Shield with the Revolution in both long and short configurations for unprecedented versatility from a pistol silencer.
In fairness, I think Griffin was the first modular pistol design, and their system works well enough, but was designed for infrequent change outs
(The revision yields itself to as many change outs as the user wants. We are the only company that has a very easy tool that included which makes configuration a breeze). And one benefit to their design is their removable booster housing is easier to keep clean
(Glad you noticed this). However, the more modular a can is and the more threaded junctions it has, the more to dick with to keep things squared away. There are recent threads on the Hybrid that point to this, and people who use left hand 13.5-1 metric Pistons sometimes unthread a rear cap that is right threaded while they torque tight a left-handed piston
(which is why we went to a tool for more torque holding capability).
I explained what wet use is and why wet is quieter. You may not GAF about that or about Glock 43s but other people read these posts and might be helped by it. It's easier to ignore TMI than fill in missing info. I should have added that wet media in a high pressure rifle can isn't recommended by most manufacturers. It doesn't do much for supersonic rounds and risks weird pressure spikes and shot to shot bullet disturbances.
If this is your first can, you'll be happy with both the CZ and the Revolution 9. Griffin keeps improving their designs and their materials and workmanship are second to none.
As far as the piston, we will buy both pistols and make a special 1/2x28 version the next time we set up the job to leave you no reason to not buy our product.