1997 March 5, Smith, E. Z., “The History Of Practical Jokes #2 (jk2m.jpg)”, in rec.humor, Usenet, message-ID <email@example.com>:
John Wilkes Booth, actor/inventor, is credited with devising the first bang-flag gun, which he introduced to the American public in 1865.
2000 January 29, IowaSt 88, “Legends of Batman - THE JOKER”, in rec.toys.action-figures.marketplace, Usenet, message-ID <firstname.lastname@example.org>:
The Joker with snapping jaw and bang flag gun.
2008 October 14, Mike, “Wanna know how I got these scars? They were $3.49 . . .”, in The Sockpuppet Asylum:
"I'm going all out with the props. A rubber fish with a big smile, a bang flag gun, and a kazoo. . . ."
2011 September 20, D’Alesandro, Dennis, “Belknapʼs bizarro world at Rebekah Templeton”, in The Art Blog:
I was waiting to be offered an exploding cigar and then shot with a bang ﬂag gun!
2011 October 15, Gaffney, Jesse, “Bang-Flag gun”, in Theatre Projects:
For Goodnight Moon there is a bit where one of the characters uses an old cartoon-y bang-flag gun.
2012 September 25, Hamilton, Mary, “The Gobstopper Job: stereotypes, shortcuts and stealing sweets”, in newsmary, retrieved 2012-12-14:
The players for each run had to pick a character class – a single thing they could do – and with it came a prop with which they could do it. Gunmen had a little bang-flag gun that let them incapacitate one policeman.
2012 November 29, “Dean Winchester with BANG Flag Gun”, in pandawhale, retrieved 2012-11-30: