Clean the thing up properly, degrease the innards, blow out the bolt with brake-drum cleaner and take it shooting. If it throws the brass too far (stuff should land on the table beside you; most accurate that way) adjust the gas system.
Weakest part in a Tok is the long, skinny rod coming back from the gas-cup to the shoter rod that actually shoves the bolt carrier back. They used to bend, especially in the cold weather: combination of bloody cold, poor design and cruddy materials in some of them. A machinist friend has the idea that substituting a length of good-grade TUBING for this rod will get rid of the problems. From what I know of the properties of materials, it sounds like a good idea.
Clean it up, take it out, have lotsa funs. Pick up your brass afterwards, take it home, reload it and do it all again.
