Non Impulse gear drive 0-320 D3G ?

[ratc]

Some time ago I bought a non impulse gear mag in preparation of removing the mags and installing two Pmags.

Today I removed the impulse and non impluse gears from the mags only to find a BIG difference in all three parts!

I bought the replacement gear as a part number 61136. Later I understood that the "current" part is listed as 68c 19622 but both would work.

Now I admit to being totally confused since all three gear drives I have a different.

Have I made a mistake with the additional non impulse gear mag gear ?

Trying to post an image but with no success so far !