[poncho]

poncho, are you sure this is N3A? I think it's don't like N3A.

This type of sight is on the F4F3 and some of the P40 models that are supposed to have the N-3A sights. So I admit that I am assuming that the in game planes are modelled correctly. It is possible that the square (support?) structures along the sight column are unique to the US Navy version of the sight and are not right for the P-39. :? There are other N3 options I think.