Firearms must be unloaded and locked in a hard-sided container and transported as checked baggage only. Firearm parts, including firearms frames and receivers, must also be placed in checked baggage and are prohibited in carry-on baggage.
- Firearm magazines and ammunition clips, whether loaded or empty, must be securely boxed or included within a hard-sided case containing an unloaded firearm.
- Small arms ammunition, including ammunition not exceeding .75 caliber for rifle or pistol and shotgun shells of any gauge, may be carried in the same hard-sided case as the firearm, as described in the packing guidelines above.
Is this clear enough?
It appears some airlines have additional silly rules:
Ensure small arms ammunition is packed in the manufacturer's original package or securely packed in fiber, wood, plastic or metal boxes and provide separation for cartridges.
What are they worried about? EMP?