Note that with the GSL Jericho and Gemtech Mossad:
1. They are made out of aluminum so no harsh chemicals to clean them.
2. Are sealed and not meant to be serviced
3. Designed to be used with unmodified UZI barrels which makes them long.
Back in the day, Dr Dater of Gemtech did a lot of custom work for UZI people. He would cut down your barrel or tell you how much to cut (basically about a 1/2" in front of the barrel flange) for support of their custom UZI mount for the MK9K. Which is what I have pictured above with my Curtis Tactical CT9KS.
I've fired the MK9K w/ this custom mount side by side a Gemtech Mossad along with several friends and we all thought the MK9K was quieter. Along with being a much shorter package and also being partially serviceable.
While today, the CT9KS is fully serviceable and no aluminum. So it addresses all of my concerns.
For .45ACP, I reached out to Dater back in the day and had him take a Gemtech .45 ACP 'UMP' can and instead of using the HK UMP 'flange' mount, I had him fit the Gemtech UZI barrel nut mount but also configured to use a chopped down barrel for the most compact length.
It was also aluminum and not serviceable and I ended up filling it up with crud also. I had mine re-cored by Curtis Tactical as well. with shielded 17-4 stainless steel baffles below.
You can see with this design no fouling ever contacts the inside of the tube. The baffles are all threaded together and pushed out as one unit. Then just dump the baffles in an ultrasonic with no concerns of harming them....which BTW is just like the CT9KS in terms of materials and serviceability.