bb.....are you talking about .....it's plastic, round, mounted on the inside of one dog, not the dog on the clutch cover the other one.
i just had to look.....my 385 and 395's have it to......are you talking about the chain catch?
sounds to me like a perfect example of a husky cutting the way a saw should and a stihl boy looking for a trick up it's sleeve so he could add it to his stihl.