I went into my safe and checked out the model number on the Remmington .22 I have. It is a 581, and I bought it for $15.00 at an auction. It sat in the corner of the milk house and was covered with paint splatter and bird crap. The extractor was broken and the inside of the bolt channel is all scraped up from the ice pick the former owner used to remove spent shells. It cleand up well, and although is not a tack driver on paper it seems to always hit what I want it to in the woods. I have less than $25.00 total in this gun. Sometimes the well used ones have learned how to work!