Safariland glock19 mag holder - Safariland 079 Concealment Magazine Holder, Snap-On, Double - STX Plain Black, Ambidextrous 079-83-41

Fits 15 rd mag like a glove. Its a little stiff the first couple of times around but works great after breaking it in.
Pros: fits perfect, good retention, not overly bulky for concealment

This review was written in the old system and had content requirements that are different than reviews written today.