40 mm M81 INERT round
thingiverse
This is a dummy 40 mm round that would have been used on a Bofors 40mm gun. There is a version with and without the separate cap, and to reduce print times, there is a version with the bottom cored out. There is no hole for the tracer because the example round I found did not have it so I could not make an accurate measurement. Designed with Fusion 360
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