"Chris, I own all of what you describe below and can answer all your questions. First,the Guarder you see here will work with the KWC and quite nicely (the air-soft version so you can add a tracer). This will NOT work with KWA's mini Uzi, unless there's something I don't know or missed (please correct me if anyone has tried as I have not). To get a tracer or mock silencer for KWA's version, it's a bit more complicated as you need to purchase a part which fits on the KWA mini uzi's top-barrel threads first. The part for this is made by G&G Armament and you'll likely need to google it to get this from other place. I have double KWC Uzis with silencer/tracers and double KWA UZI's with Silencer/Tracers and they are absolutely AWESOME. But different styles, as the KWC is full size and hard kick, while the KWA is of the micro-UZI design with less kick but still very nice (KWA uses Green gas while KWC uses Co2 for obvious power reasons). Nevertheless, the G&G armament piece for the KWA will screw OVER the top of the barrel, but inside, you will need to add your tracer model with the included spacers that G&G includes for you. HOWEVER.... be advised you will need another part when using tracers, such as the "AT" series. You also need to purchase sprigs to seal the tracer within the the G&G silencer as the tracers fit the included gaskets perfectly, but do not have "stops" inside them, requiring the use of TWO springs for the barrel to be on the safe side.
I researched over a year for this as we run movie studios and either option is purely awesome. But if you go with KWA just remember its a different type of barrel, it needs 2 springs and if you want a tracer its external versus the guarders on the KWC will naturally be external. Comment or contact me back if you want full setup instructions, part numbers and pictures, as Ive done all the hard work for you (and anyone else interested) already.
Lastly, KWA makes a Skorpion green gas model, and there ARE tracer options for this as well, but again, its going to be a custom sort of ordeal. Good news is I also did all the handwork already for you so if you want tracers/barrels/rails for lasers, etc. etc. on these models (or anything above), let me know and Ill get you setup instructions, part numbers and links to them. Many are available through Evike, but if not, they are still easy to obtain through other vendors. Evike's a great place and Ive been a customer for years, but they dont always have everything, especially for the KWA's needing some special mods.
Hit me up if you want anything explained furthr, or anyone for that matter. Of course, if anyone has newer updated info, your welcome to add that in as well. this is for all of us. My build was completed and accurate as of January 2021.
Cheers and be safe
"Fits the KWC Mini Uzi perfectly, better than the oem outer barrel! OEM barrel stabilizing O-ring must be removed from inner barrel, because its not needed! OEM inner barrel fits snuggly inside Guarder steel barrel without any slop! It is shorter than OEM outer barrel.. inner barrel is nearly flush with outer barrel once installed.
I hope Guarder makes a standard size steel barrel with the slant cuts next!!