1997 March 5, E. Z. Smith, “The History Of Practical Jokes #2 (jk2m.jpg)”, in rec.humor[1] (Usenet), message-ID <5fk4be$2ic$2@taurus.cybergate.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[2] (Usenet), message-ID <20000129094355.22221.00000278@ng-ba1.aol.com>:
The Joker with snapping jaw and bang flag gun.
2015, Keith Korman, End Time, Macmillan (→ISBN), page 119:
[…], tattoos on anonymous arms, a photo of the Bang-Flag-Gun that got her into all that trouble. She flipped past it, but discerned no discernable order, no notations, no police work to the drawer.
2016, Barnaby Haran, Watching the red dawn: The American avant-garde and the Soviet Union, Manchester University Press (→ISBN):
... but there is none of the sloganeering that typified League productions. If the League saw film as a 'weapon of the class struggle', then Pie in the Sky is a cinematic bang-flag gun. If Zuker and Alexander deem the film apolitical, I suggest that ...
2020, DC Vesser, More than Don't Let 'em Win, Page Publishing Inc (→ISBN):
On March 12, 2017, Snoop Dogg released “Lavender,” a controversial clown-themed music video in which Snoop Dogg is seen firing a prank “Bang!” flag gun at a clown dressed to resemble President Trump.
2008 October 14, Mike, “Wanna know how I got these scars? They were $3.49 . . .”, in The Sockpuppet Asylum[3]:
"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, Dennis D’Alesandro, “Belknapʼs bizarro world at Rebekah Templeton”, in The Art Blog[4]:
I was waiting to be offered an exploding cigar and then shot with a bang flag gun!
2011 October 15, Jesse Gaffney, “Bang-Flag gun”, in Theatre Projects[5]:
For Goodnight Moon there is a bit where one of the characters uses an old cartoon-y bang-flag gun.
2012 September 25, Mary Hamilton, “The Gobstopper Job: stereotypes, shortcuts and stealing sweets”, in newsmary[6], 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[7], retrieved 2012-11-30:
