The bar is held in place by a cap nut on the outside cover, but it’s kept from moving up and down by a molded-in plastic pin, which broke almost immediately. It is damn near impossible to keep the chain on the bar. I was able to finish what I needed to do (remove two small trees that had blown onto the lawn, with attendant vines still attached). I might pull the motor and ditch the rest of the saw.
I’ve gotten some good stuff from HF (a caliper, some micro screwdrivers, etc., but I’ll be buying American from now on.