Forward Controls Design Carrier Cam Pin w/Dimple Witness Mark Silver SCP NP3. Cam pin usually wears more heavily on one side putting the cam pin in one direction then another randomly creates uneven wear on the cam pin and it becomes sloppy and loose in the bolt. When the cam pin is installed always facing the same direction it leaves one side less worn and more intact this has the effect of better maintaining a tight fit of the cam pin in the bolt and reduces wear cam pin itself as well as on the cam pin bore on the bolt. The idea of SCP or consistently reinstalling the cam pin in the same orientation isn't so much about saving the cam pin as it is reducing the resulting wear and stress introduced to the bolt. Features of Forward Controls Design Carrier Cam Pin w/Dimple Witness Mark Witness mark for consistent installation MIL-SPEC construction Package Contents: Forward Controls Design Carrier Cam Pin w/Dimple Witness Mark Forward Controls Design SCP NP3: Carrier Cam Pin w/Dimple Witness Mark Silver