Aus_Schwaben
First to know - Last to care!
My BIL used to put a starter pistol in his checked luggage and declared it in order to prevent loss of the luggage.It’s the more normal way nowadays. Keeps the bag from getting lost in transit. I’ve had better luck getting my bags on time and not destroyed with a firearm in them.
But I’ve also changed to travelling with a carryon for clothes and the guns, knives, and ammo go into cube shaped pelican cases and are the only thing that gets checked.