We have lasered an arrow on the top of the cam pin so the user can always reinstall the cam pin on the carrier in the same orientation. Putting the cam pin in one direction rather then another randomly alleviates uneven wear on the cam pin and it become sloppy and loose in the bolt. When installed in the same direction it leaves less of a chance of the cam pin being worn on both sides thus maintaining a tight fit on the cam pin in the bolt.