Did these ever serve in U.S. forces?
No. They were made by the French unit that used them. They survived to postwar – even being taken to Indochina and used against the Vietminh
Interesring.
You mean 40mm.
Closest thing we had to that would be either the M15 Special with the Bofors 40mm or the standard M15 and M15A1 with two M2’s and a 37mm.
M15 Special:
M15A1:
Wow that is cool.