Polymer parts haven't been an issue in 3 seasons of hunting for me. No one else I personally know has had a problem either. I did read the guys post at 24 campfire but he got some type of bore cleaning solvent on his that caused it to become brittle. I disassemble my rifles for cleaning and can't imagine that happening. Hell, most of that stuffs bad news for almost any type surface except the one it's intended for. Honestly for 99 percent of the people in this country I doubt seriously that they would ever have a problem with a Tikka part.