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Official website of the Department of Homeland Security

Transportation Security Administration

Shell Casings

Carry On Bags: 
Yes (Special Instructions)
Checked Bags: 
Yes

Empty shell casings are allowed in carry-on bag as long as the projectile is no longer intact. They are allowed only if the primer has been removed or has been discharged. If the projectile is attached & the powder has been drilled out, it is considered a replica and not allowed in carry-on.