Not quite. The 40mm Bofors is still in current use. The 2pdr pom-pom was a different, lower muzzle velocity, less effective weapon - still in use but obsolete by world war II (40mm upper - pom-pom lower)
Thanks, I did have them confused.
I think that we had short range artillery posted all up and down the coast of california during 1942. Pompoms, 37mm, 3 inch guns (later used as antitank guns) or 90mm (also used as antitank guns).