The twin 40mm self-propelled gun T141 was developed using the M41 tank chassis as basis with a large gun mounting housing the twin 40mm Bofors M2A1 cannon with full 360 degree traverse. The first T141 was delivered in April 1952 and redesignated twin 40mm self-propelled gun M42 in October 1953 and commonly referred to as the “Duster”.

With the upgrading to the fuel injected AOSI-895-5 engine it was reclassified as the M42A1, there were several smaller features that changed during production, most noticeable the early two hatches between the top crew hatches were replaced but a single flat plate on later vehicles and the head light array of later vehicles included the horn and black out driving light with redesigned brush guard.

It should be noted that as this was classified as a self-propelled gun it did not have a turret as commonly referred to with a tank but instead a “gun mounting” housing the two 40mm cannon, a small technical point for those wishing to know. I will refer to the “gun mounting” in the review as this is the correct description after all.

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