I have one that I am in the process of turning into an "Evil Black Rifle". Not too bad to tear down, you have to take it out of the stock and unscrew the back of the action to remove the firing pin and spring assembly. It's a neat little .22, mine works great and is pretty darn accurate, magazines are dang expensive. No real need to tear it down, hose it out with gunscrubber and give it a shot of CLP or remoil on the bolt and it's kinda like a Marlin 60, just keep shooting it.
Here's the latest pic of mine, still waiting to get a bipod and a weaver rail to mount a light on it... yeah, it's a lot of time to put in on a .22, but like I said, its a neat little rifle! I milled the inside of the carrying handle to take a standard AR weaver rail adapter, mounted a Center Point 3-9x32 adjustable objective scope with red/green illuminated mildot reticle, a barrel shroud and upper handguard that I fabricated.
handguard (crappy iPhone pic, sorry)