Beware/ Just a heads up when purchasing CZ rimfires. Be sure to check the barrel for cosmoline. I purchased a discontinued like new 452 Trainer in 22 LR at the Conroe gunshow a month ago. Thankfully I decided to run a patch through the barrel and clean any residue, etc. The rod / jag got stuck immediately. Had to use a 17 caliber rod and jag to start the dissolving and cleaning process. Did some research and it has been reported the manufacturer coated the inside of some barrels with cosmoline. Obviously this one has never been fired.