Hawaiian doesn’t allow ammo to be stored in mags even though TSA and other airlines do. Ammo must be stored in original packaging (boxes, not loose) or in a plastic container that keeps the rounds from touching each other.

I tried to fly with ammo in mags once and I had to turn over the ammo to the airport police and they had to fill out a report.

Technically any lithium ion batteries need to be carried in your carry-on due to fire hazards. Hawaiian and a couple flights where lithium ion batteries exploded in the cargo causing an internal fire…that being said, I’ve never taken out the batteries from the lights/optics when flying.