I used a 1911 mag pouch that has internal flat springs for retention, and they keep plenty of pressure on the smaller SIG mags. The spacing of the double pouch is compatible with the extensions on the 7-rounders, too.
SigTalk is a forum community dedicated to SIG Sauer enthusiasts. Come join the discussion about Sig Sauer pistols and rifles, optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!