Garys
NES Member
Neither a 69xx nor 59xx magazine is going to fit into a Shield. Both are double stack and the only Shield I've held iis definitely a single stack. That curved pinky base plate came with the 69xx magazines. You can swap them, but they don't look quite right without doing some cutting on the baseplates.
I just compared a 5906 mag to a 9mm shield mag. Length, pretty damn close, let’s call it the same. Width (front to back), let’s call it the same....I’m no busting out the calipers here, but within spec. Thickness, not even close. 5906 mag has different angle going from double to single, of course, and the 5906 mags I have look pretty damn close to the obviously not a shield mag in the pic. I’ll defer to your S&w expertise on it being a 69 series mag. Still, likely pretty tough to get that into a shield!!!
That mag looks like two of my mec-gar, definitely not pre-ban 5906 mags. The older ones I have are shiny stainless....