Here are a few parts off a ms441. Bought the LOT if parts off eBay a while ago for the piston and cylinder. This is what's left over. Looks like it was an ARCTIC model. No idea about the carb. When I bought the parts it looked like it came from a dealer or something and they just boxed up a bunch if parts from a teardown of a saw. The piston and cylinder were perfect BTW. $40 plus shipping.