Does anyone make high cap sig mags?

[Axion]

Factory mags for the 229 hold 12 for .40/.357 and 13 for 9mm. Is there anyone who makes an extended mag that holds a few more?

 

[Hans]

You might try Mec-Gar mags. I'm not sure if they have specifically what you are looking for, but they had 15 rnd. mags for my 228.

 

[kymasabe]

Mec-Gar makes Sig's mags so anything from them should work. Also, check into Sig's line of accessories, I think they make a 20 or 30 round mag.