Question about Sig magazines

MTG

Inactive
It seems like I remember reading about a company that makes mags with a different stacking method that holds more rounds (with approximately the same size mag), but I can't remember who it was or where I read it. I'm looking for a mag for a P229 9mm and P239 .40 for but I'm sure they make mags for more than just Sigs...and idea what I'm talking about? Or am I just imagining this?
 
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