Safariland 774 mag pouch - Safariland 774 Rifle Mag Pouch, New Belt Loop System - STX Basket Weave, Ambidextrous 774-215-48

I chose this because it was concealable with a twenty-round magazine. The basketweave version was on sale, so ordered one. After using it while climbing over obstacles, getting in and out of cars, etc. I may order another.
Pros: good retention charactristics without encumbrances
Cons: cost

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