This is a Model 70 Winchester Push feed with a Standard bolt face. You can see I installed a Mini M-16 extractor and Bushed the firing pin hole. The reason for this was, someone had machined on the bolt and opened up the bolt face diameter. The case would slide out from under the extractor and drop off in the action. This can also be installed in Model 70 Push Feed Winchester, if you want to change the bolt face to work with another diameter case head.