The first Dusters arrived in Vietnam in the autumn of 1966, primarily to soothe the Army's anxiety about the North Vietnamese Air Force's possible ground strike capability. When the North showed it was totally focused on aerial combat over Hanoi and Haiphong, other uses were found for the Duster's twin 40mm guns. It was soon discovered that the wet jungle terrain was too much for the Continental 500hp gasoline engine, serious overheating being a widespread problem, and several vehicles were disabled due to engine fires. The Duster was quickly restricted to lighter duty, but it turned out to be a first-rate base perimeter defense and convoy fire support vehicle. 240 40mm rounds per minute can be pretty daunting.
Mrs History PhD asked for Vietnam photos of the Duster and here are the ones I provided:
And here's what the wife has turned out:
She says she's not entirely happy, as the ready ammunition boxes are empty (they're awaiting the arrival of some brass wire from which to make 40mm shells). Also, she wanted to add an M60 mount on the right side of the turret, but no one seems to make loose accessory M60s in 15mm. I told her to bide her time and we would pirate an M60 from a future helicopter or infantry set that she paints. It'll be easily retrofitted.
So, needless to say, when I asked if she had gotten 15mm out of her system now, I got "the look":