Talk about cleaning, i purchased two ruger 22lr pistols a MkI and a MkII. The MkI was so leaded up from shooting in the breech area(slide open area) i wonder why the PO traded it in, maybe because it wouldn't shoot anymore? It was never disassembed and cleaned properly from the day it was purchased. I cleaned and moly'd it up and i have an awesome pistol for under $150. While its no CZ Kadet its a shooter.