Extractor for a CPA 44 1/2 rifle. These extractors are typically slightly long, so if you are fitting it yourself you should have the extractor installed when you do the finish chambering so the extractor is fit at the same time. Choose the extractor which matches the case base you need. For a full list of calibers and the case bases see here.
The set screw in the extractor allows you to adjust the extractor travel in case you are having trouble with the case going over the extractor or if the breechblock gets stuck under the breechblock plunger.
These extractors are similar to an original Stevens 44 1/2 extractor except the hole on the original extractor is larger and the length is slightly different.