Can I express the used shell casings?

Empty shell casings do not belong to the category of ammunition, and can be sent by express mail. The express delivery of shellfish products is actually not a prohibited item in express delivery. However, if you encounter a special period, you need a courier to come and collect it.

Extended data:

Shell is the basic component of a bullet or shell, and its function is to connect the bullet, primer and propellant into a whole, so as to ensure the positioning of the whole bullet in the bore, prevent the propellant from being affected by external conditions, and prevent the gunpowder gas from leaking from the tail of the bore and directly ablating the bore during shooting.

References:

Baidu encyclopedia shell shell shell