Quite a few of the guys who flew the BN2A's in TPNG some forty five years ago carried a loaded revolver in their flight bag. Came in very handy if one of the locals got a bit uppity in flight.
Seen a practical demonstration. Captain passes control to No2, and then with gun in hand pointing down the cabin states in pidgin "I will shoot the next barsteward that moves". Deathly silence.