Was just introduced to the empty chamber barrel flag. Any one ever use these? Opinions on them? : r/ar15

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MT Chamber Flags — Firearms Insider

FSDC (Firearm Safety Devices) - FSDC-550RRCF Rifle

Empty Chamber Indicator « Daily Bulletin

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Empty Chamber Indicator « Daily Bulletin

Gun Empty Chamber Safety Flag Range Firearm Rifle Pistol ~ .17c

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FSDC (Firearm Safety Devices) - FSDC-550RRCF Rifle

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GARRET MACHINE Rifle Barrel Safety Chamber Plug/Flag