I am looking for information pertaining to th Stevens 520 pump shotgun . I canfind all kinds of info. on the 520A, but not the 520 (last Pat. Date Aug.1907). I have one that is missing a part. I don't know the name of the part, or what it looks like. The function of said part, is to release the slide (bolt) lock when the gun is fired, so the gun can be "racked". Reply to: Dave at
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