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the one shotgun says this
"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 this military spec ghost-ring sight. The rear sight is click-adjustable for both windage and elevation with a coin or shot shell rim. These sights are intended for rough service with rugged ?wings? to protect the removable ghost ring and front post."
Is that like mini night vision or something?
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