When the lights go out, you'll have the advantage with these ghost-ring tritium inserts. Optional three-dot inserts can be easily installed into the military spec ghost-ring sight.
Benelli Tritium Insert for ghost ring sights, Fits M4
WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov