i just bought plain screw in types , the quick detachable ones , drill i small hole an screw them in, one time i bougth one of the threard ones for a reminginton 7600, and i drilled thru the forearm , and used a washer and kock nut inside the forearm , since i was goint to use it for a harris pod, butthe regular wood screw type will usually hild up on them