Can 4013 mags work in a 6906

[Psycshrink]

Are the magazines from a 6906 and a 4013 TSW interchangeable?They look identical to me in size and shape and they will cycle snap caps. Anyone have any experience with this? Thanks
Bob

 

[Sevens]

I don't have any of the midsize/short grip pistols but I can say without a doubt that full size 5906/4006 mags will definitely NOT swap, much like the 4506/1006 mags that also look incredibly similar.