Mine is about 7 years old and has about 5000 rounds through it. Most of that has been Federal "Semiauto Match". Malfunctions are VERY rare with it, and usually just the usual rimfire "failures to fire". Extractor is the original. I keep the bolt and bolt guide rails well lubricated, and when the crud buildup on the face of the bolt gets excessive I clean it up. Other than a red dot optic, the only modification I've made has been a trigger upgrade.

As .22 semi autos of any type go, it's as trouble free as they get.