gemmer wrote:
PinecastleAAF wrote:
A spiffy post war M16 with a Twin 40mm Duster behind it.

The Duster and quad .50 were still in use in Vietnam for convoy protection and firebase defense.
Duane
That's actually an M19 MGMC in the background. Same guns and similar turret to the M42 Duster, but designed during WWII and used in combat in Korea. It mated the M24 Chaffee hull with the twin 40mm mount in a fully traversing turret. Only 300 were built, however and all were produced in 1945. They were replaced in service by 1953 by the M42 Duster, which used the M41 Walker Bulldog hull and a far more powerful powerplant.
The quad .50s used in Vietnam were the M55 towed variants, usually mounted either on M35 2.5 ton or M54 5 ton trucks. No M16 MGMCs were used by US forces in Vietnam.
Jon