What powder are you using, or factory ammo?
I'll have to get a piece of shim stock for my MK9K. A buddy of mine shot a bunch or his reloads through my Mini Uzi with the MK9K and it was full of charcoal when we were finished.I took my CT9KS apart this morning to see how the build up is looking.
This is why I love this design. No concerns about cleaning this thing with the materials used (SS) and the shim stock will make this a breeze.
Any of you guys got some pics on how yours look after X amount of rounds?